Category Archives: invertebrates

Episode 186: Velvet Animals

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This week’s episode is about some invertebrates who look like they’re made of velvet! Thanks to Rosy and Simon for their suggestions!

Further reading:

Red Velvet Mite

Chigger Bites

Structure and pigment make the eyed elater’s eyespots black

The red velvet mite looks like a tiny red velvet cake but is NOT CAKE, NOT A SPIDER, NOT A SPIDER CAKE:

GIANT RED VELVET MITE:

Regular sized red velvet mites on a fingertip and one parasitizing a daddy long legs spider:

An eastern velvet ant female (it’s actually a wasp, not an ant):

Velvet worms on hands:

A blue velvet worm!

Look at its teeny mouf!

An eyed click beetle DO YOU SEE THE EYES(pots):

The velvet asity (maybe you notice that it’s uh not an invertebrate):

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

As we continue invertebrate August, we’ve got a nicely themed episode this week, velvet invertebrates! Thanks to Simon and Rosy for their suggestions!

First, let’s talk about Rosy’s suggestion, the red velvet mite. It sounds delicious, but only because it makes me think of red velvet cake. But the red velvet mite is an arachnid, related to spiders and scorpions–but it’s not actually a spider.

In English, the word mite, spelled m-i-t-e, means a tiny thing, and mites are tiny. Most are under a millimeter long. Scientists actually group mites into two kinds, parasitic mites that are closely related to ticks, and velvet mites that are closely related to chiggers. Chiggers, my least favorite. All the many species of velvet mite and chigger are in the order Trombidiformes.

You know what? Let’s talk briefly about chiggers, because there’s a lot of bad information about them out there. The chigger lives in vegetation, especially tall weeds and shrubs. Various species live throughout the world but it’s more common in warm, humid areas. In some places it’s called a harvest mite or scrub-itch mite.

The chigger is only parasitic as a larva. The larvae only have six legs, compared to adults that have eight. A larva waits on a blade of grass or a leaf for an animal to brush past it, and when it does, the larva grabs on. The longer you stay in one place, for instance when you’re blackberry picking, the more likely it is that a chigger will crawl onto you. It’s very nearly microscopic so you can’t look for chiggers and pick them off the way you can ticks. Like velvet mites, they’re red in color but generally paler than actual velvet mites.

A chigger bite causes intense itching, swelling, redness, and takes sometimes several weeks to heal, especially if you scratch it. It also gets infected easily. Many people believe that the chigger actually burrows into the skin. The chigger does eat skin cells from the layers of skin below the outer layer, but they don’t actually have mouthparts that can bite that deeply. They certainly can’t burrow into the skin. What they do instead is give the skin a little bite and inject digestive enzymes into the wound. The enzymes break down the skin cells they touch, and also harden the tissues around the wound. The chigger slurps up the liquefied skin cells and injects more enzymes, which seep down deeper into the skin, until basically what it’s created is a tube of hardened skin cells that reaches the lower layers of skin. The tube is called a stylosome, in case you were wondering. All this takes several days, so the best way to treat chigger bites before they get bad is to take a hot shower as soon as possible after you’ve been blackberry picking or whatever, and scrub well, especially around places where your clothing was tight. You also need to wash your clothes in hot, soapy water to kill any chiggers still on them.

The best way to deal with chiggers is to wear a good insect repellent and make sure to apply it all the way from your feet up, paying special attention to ankles, the backs of your knees, and around your waist and stomach.

Okay, that’s enough of that. Let’s talk about actual red velvet mites that don’t bite and that you can see. The red velvet mite is covered with short, dense hairlike structures that may act as sensors to help the mite find its way around in the dark or underground. The hairs are orangey-red, although some species may have white spots. Adults have eight legs like spiders do, but each pair of legs grows from a different part of the cephalothorax instead of from the same place like in spiders. Adult red velvet mites generally eat insect larvae and eggs. But the red velvet mite larvae are parasites—but not chigger-type parasites. They don’t bother people or pets, and in fact they only parasitize invertebrates like insects and spiders. A red velvet mite larva will grab onto certain types of insect like grasshoppers or beetles, or some spiders like daddy long-legs. It rides around on the insect and sucks its hemolymph like eensy-beensy insect ticks.

To attract a female, the male red velvet mite leaves droplets of sperm on twigs and grass in a little area and spins an intricate trail of silk leading to the droplets. The female examines the silk trail and if she finds it well-made, she’ll gather up some of the sperm to fertilize her eggs. But if another male comes across the trail, he’ll tear it up. The female lays her eggs in the soil.

There are thousands of species of velvet mite throughout the world, with many more undoubtedly yet to be discovered. Most are teensy, but there are some bigger species called giant red velvet mites.

There are actually two totally different mites called by that name. The first one lives in southwestern North America in dry areas, and includes several species in the genus Dinothrombium. The adults eat ants and termites. Like other mites, people are most likely to see them walking around on outside walls or patios or deck railings, usually lots of them in one area and often after summer rain. That’s why they’re sometimes called rain bugs. But while most velvet mites are just little moving red dots, the giant red velvet mite can grow up to 12 mm, which is almost half an inch long. In the mite world, that really is giant.

The other species called the giant red velvet mite lives in parts of northern India in dry areas, Trombidium grandissumum, and it can grow up to two cm long, or over ¾ of an inch. Like most other red velvet mites, it mostly lives underground and eats insect larvae, many of which are harmful to crops.

So why are red velvet mites so red? Surely that would make them easier for predators to see. Well, the red velvet mite contains compounds that make them taste bad and may be toxic, so the bright red color advertises that to predators.

The red velvet mite will curl its legs in to make itself smaller if it feels threatened, which is oddly sweet. Be safe, little mites.

Next, let’s learn about the velvet ant. It’s not an ant at all but a wasp, although wasps and ants are closely related. The female has no wings although the male does, but the male doesn’t have a stinger while the female does. Sometimes it’s called the cow killer ant because its sting is so painful that people think it could practically kill a cow. It can’t kill a cow. Or a person, for that matter, but one species of velvet ant was scored for how painful its sting was and it ranks right up there with bullet ants.

Like the red velvet mite, there are thousands of species of velvet ant that live throughout the world. The females and usually the males have plush-looking hairs, some species with orange or red hairs, some with other colors and patterns like black and white. In the case of the velvet ant, the bright coloration is to warn potential predators that this is a dangerous wasp and they should steer clear! It’s also a tough insect with a thick exoskeleton.

The biggest species of velvet ant is the eastern velvet ant, which lives in the eastern United States. It can grow almost two centimeters long, or three-quarters of an inch, and is orangey-red with a black stripe on its abdomen and black legs.

If you remember way back to episode 28, about crawdads and cicadas, we talked briefly about a huge wasp called the cicada killer. The cicada killer can grow up to two inches long, or 5 cm, which is simply enormous when one gets into your house and you worry it’s going to just move in and complain that the furniture is too small. Anyway, the cicada killer does something horrible to the cicada. The female stings a cicada, which paralyzes it but doesn’t kill it. Then it carries the cicada to its burrow and lays an egg on it. When the egg hatches a day or two later, the larva eats the still-living cicada.

Well, I bring this up because velvet ants do the same thing to cicada killers! Comeuppance in the insect world! The female velvet ant searches for cicada killer burrows, and when it finds one with a larva inside, eating a cicada, it lays an egg on the larva. The egg hatches and the velvet ant larva promptly eats the cicada killer larva which is in turn eating the cicada. This is a way different circle of life than they talked about in the Lion King.

Next, let’s talk about a different kind of invertebrate, the velvet worm. It’s not a worm and it’s also not fuzzy like the animals we’ve talked about so far, but its body does have a soft, velvety texture. There are about 180 species known in two families. It lives in tropical areas in Central and South America, the Caribbean, parts of Africa and Asia, and Australia and New Zealand, but we know it used to be more widespread because we’ve found velvet worms in Baltic amber from what is now northern Europe. It has a soft, segmented body that’s covered with a very thin layer of chitin with tiny overlapping scales. This makes the velvet worm look velvety and acts as a water repellent so the body won’t dry out, but it also needs plenty of humidity in its environment to survive.

At first glance, the velvet worm looks like a caterpillar. It has a caterpillar’s stumpy bumps of legs and a long soft-looking body like a caterpillar. Various species grow to various sizes, but the largest is only about eight inches long, or 20 cm, and most are much shorter. Different species are different colors, from brown or reddish to blue, white, or even bright green like a caterpillar. But it’s not related to any animal that goes through a caterpillar-like stage of life. Scientists aren’t even completely sure what the velvet worm is actually most closely related to. It shares features with some of the strange animals that evolved during the Cambrian, and currently many researchers think it’s a descendant of a group of Cambrian animals called lobopodians, a group which includes Hallucigenia. You may remember Hallucigenia from episode 69.

Some beautifully preserved fossil ancestors of velvet worms have been found in a Canadian fossil bed dated to 425 million years ago. While modern velvet worms live exclusively on land, its 425 million years old ancestors lived in shallow coastal water.

These days, velvet worms are uncommon animals that mostly live in leaf litter or under rotting logs or similar places. Two species even live in caves. It’s mostly nocturnal, although it will come out during the day in rainy weather. During the day, or when it’s too dry or cold for its liking, it will rest in tiny crevices in its habitat. That may be just a deep crack in the earth or a rock, a tunnel originally dug by termites, or a little hidden spot inside a rotting log. It’s eaten by a lot of animals, including birds, insects, spiders, rodents, and snakes, so it’s good at hiding.

But when the velvet worm is out hunting, it is fearsome to its prey. It mostly eats small invertebrates like insects, worms, spiders, and snails, but it can kill animals its own size or even a little larger. And it doesn’t need to eat very often, maybe once a week or even just once a month.

The velvet worm has a pair of retractable antennae that act as feelers that the velvet worm uses to very lightly touch potential prey to see whether it wants to attack. It will sneak up on an animal and use these feelers to touch it so lightly that the animal has no idea the velvet worm is there or is touching it. If that doesn’t creep you out completely, you haven’t read the spooky horror stories I’ve read, that’s all I can say. At the base of the antennae the velvet worm has a pair of eyes, although some species don’t have eyes at all.

The velvet worm’s mouth contains a sharp pair of mandibles, but these are actually inside the mouth, sort of like teeth although they’re nothing like teeth, rather than external mandibles like those of insects. But it’s behind the mouth where things get really interesting, because that’s where the slime is secreted. The velvet worm has a pair of slime glands in its body that generate and hold extremely sticky slime. The velvet worm squirts it from two tiny openings on the sides of its head to form a sort of net that ensnares its prey. If the prey is large or strong, the velvet worm may squirt more slime at its legs to keep it immobilized.

The slime immediately starts to dry and harden, and as it dries it contracts. Then the velvet worm bites the animal and injects digestive saliva into the wound that liquefies the tissues it comes in contact with. Sort of like a chigger. While it’s waiting for the saliva to do its work, the velvet worm eats up the slime it discharged, because it’s made of proteins and takes several weeks to regenerate. Then the velvet worm clamps its mouth over the wound and slurps up the liquefied insides of its prey, which by the way is very dead by this point.

But the really amazing thing is that some species of velvet worm are social. It lives in family groups that hunt together, led by a dominant female. She eats first, then the other females, then the males, then any young. Females are usually larger than males.

Velvet worms have been well studied and I could go on and on about them. I might return to them eventually and give them their own episode. But let’s go on now to our last velvet animal, the velvet asity.

Simon suggested the velvet asity of Madagascar when we were talking on twitter about an insect called the eyed elater, or eyed click beetle, which lives in forests in North and Central America. It’s a slender beetle that grows about 2.5 inches long, or 4.5 cm. The larvae are sometimes called wireworms because they’re so long and skinny. They eat the grubs of other beetles that live in rotting wood, but it’s not known what the adults eat, if anything.

Like other click beetles, if it feels threatened, the eyed click beetle can suddenly launch itself away with its click mechanism. This is a spine underneath its thorax that fits into a groove between its legs. If the insect is threatened, it flexes its body to release the spine, which snaps against whatever surface the beetle is touching and catapults it sometimes several inches away.

The eyed click beetle is black and mottled gray to blend in with tree bark, but it has two large eye spots that are probably meant to frighten predators away. The eye spots are black outlined with white, and the black part contains cone-shaped microtubules made of modified setae that contain the pigment melanin. Between the pigment and the shape of the hairs and the way they’re aligned, the eyespots absorb 96.1% of light that hits them. This makes them look much larger and more conspicuous to potential predators.

Quite a few insects and some other animals have developed similar coloring that will absorb light, often called super-black. And that brings us to the velvet asity, the male of which is almost all super-black as an adult except for bright lime green wattles above the eyes.

Uh, and this is where I have to admit I made a mistake. I often take quick notes about animals people recommend, especially if the recommendation comes from a Twitter conversation that’s easily lost. Later on I transfer my notes to the big ideas spreadsheet. Well, this time I made a note that said “Velvet asity of Madagascar, Simon replied with this to a twitter post about the eyed elater, with specialized hairs in the eyespots that deaden reflection.” That’s literally what’s in my notes, and I listed it under the invertebrates tab because I forgot what the velvet asity is and just assumed it was another insect like the eyed click beetle.

But the velvet asity isn’t an invertebrate, which I only discovered after I’d started researching the other velvet animals in this episode. It’s a bird. But what a bird it is! It’s a little round bird with a very short tail, short wings, and amazing coloration! While the female is a streaky olive color, the male’s breeding plumage is striking.

The super-black coloring of the male velvet asity deadens reflections and makes its green eyebrows look even brighter, which attracts females. The velvet asity lives in the rainforests of Madagascar and mostly eats fruit, but it will also eat nectar and some insects. During breeding season, males gather in small groups called leks to show off for females with a mating dance that involves him flipping all the way around the branch he’s standing on. The female weaves a pear-shaped nest that hangs from a branch and is camouflaged because she uses materials like strips of bark, leaves, and moss to make it. She also takes care of the eggs and chicks by herself. All the male does is show off, but you can hardly blame him. If you’ve got it, flaunt it, velvet asity.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or just tell a friend. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 185: Ice Worms, Army Ants, and Other Strange Invertebrates!

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Let’s learn about some weird insects this week! Thanks to Llewelly for suggesting army ants!

Further reading:

If you’re interested in the magazine Flying Snake, I recommend it! You can order online or print issues by emailing the editor, Richard Muirhead, at the address on the website, and there’s a collection of the first five issues on Amazon here (in the U.S.) or here (UK)!

The magnificent, tiny ice worm! The dark speckles in the snow (left) are dozens of ice worms, and the ones on the right are shown next to a penny for scale. Teeny!

ARMY ANTS! WATCH OUT. These are soldier ants from various species:

The Appalachian tiger swallowtail (dark version of the female on the right):

Tiger swallowtails compared:

The giant whip scorpion. Not baby:

Jerusalem cricket. Also not baby but more baby than whip scorpion:

PEOPLE. GET THOSE HORRIBLE THINGS OFF YOUR HANDS.

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week we’re going to talk about a number of strange and interesting invertebrates as part of Invertebrate August. Thanks to Llewelly for a great suggestion, and we also have a mystery invertebrate that I learned about from the awesome magazine Flying Snake. Flying Snake is a small UK magazine about strange animals and weird things that happen around the world. It’s a lot of fun and I’ll put a link in the show notes if you want to learn more about it. It’s been published for years and years but I only just learned about it a few months ago, and promptly ordered paper copies of all the issues, but they’re also available online and the first five issues are collected into a book.

So, let’s start with an invertebrate I only just learned about, and which I was so fascinated by I wanted to tell you all about it immediately! It’s called the ice worm, and it’s so weird that it sounds like something totally made up! But not only is it real, there are at least 77 species that live in northern North America, specifically parts of Alaska, Washington state, Oregon, and British Columbia.

The ice worm is related to the earthworm, and in fact it looks like a dark-colored, tiny earthworm if you look closely. It’s usually black or dark brown. It likes the cold—in fact, it requires a temperature of around 32 degrees Fahrenheit, or zero Celsius, to survive. You know, freezing. But the ice worm doesn’t freeze. In fact, if it gets much warmer than freezing, it will die. Some species live in snow and among the gravel in streambeds, and some actually live in glaciers. Ice worms can survive and thrive in such cold conditions because their body contains proteins that act as a natural antifreeze. It navigates through densely packed ice crystals with the help of tiny bristles called setae [see-tee] that help it grip the crystals. Earthworms have setae too to help them move through soil.

During the day, the ice worm hides in snow or ice to avoid the sun, and comes to the surface from the late afternoon through morning. It will also come to the surface on cloudy or foggy days. It eats pollen that gets trapped in snow and algae that is specialized to live in snow and ice, as well as bacteria and other microscopic or nearly microscopic animals and plant material. In turn, lots of birds eat ice worms. Birds also occasionally carry ice worms from one glacier or mountaintop to another by accident, which is how ice worms have spread to different areas.

The glacier ice worm can grow to 15 mm long and is only half a mm thick, basically just a little thread of a worm. It only lives in glaciers. You’d think that in such an extreme environment there would only be small pockets of glacier ice worms, but researchers in 2002 estimated that the Suiattle [soo-attle] Glacier in Washington state contained 7 billion ice worms. That’s Billion with a B on one single glacier. Other ice worm species can grow longer than the glacier ice worm, including Harriman’s ice worm that can grow nearly 2.5 inches long, or 6 cm, and is 2.5 mm thick.

There are tall tales about ice worms that can grow 50 feet long, or 15 meters, but those are just stories. An ice worm that big wouldn’t be able to find enough to eat.

Next, let’s talk about a type of ant. Llewelly suggested the army ant a long time ago, and recently I got an email from Ivy whose list of favorite animals includes the army ant!

The army ant lives in parts of Africa, South America, and Asia, and although there are some 200 species in different subfamilies, recent research suggests that many of them are descended from the same species that lived in the supercontinent Gondwana more than 100 million years ago.

Army ants don’t dig permanent nests like other ants. Instead they make temporary camps, usually in a tree trunk or sometimes in a burrow the ants dig. But these camps aren’t anything like ordinary ant nests. Often they’re formed from the bodies of worker ants, who link their legs together to make a living wall. The walls form tubes that make up chambers and passages of the nest, and inside the nest the queen lays her eggs. There are also chambers where food is stored. But the nest isn’t permanent. At most, the army ant only stays in one place for a few weeks, after the larvae pupate. The colony feeds the food stores to the queen, who lays a new batch of eggs timed to hatch when the new ants emerge from their cocoons. At that point, the colony breaks camp and enters the nomadic phase of behavior until the newly hatched batch of larvae are ready to pupate.

What do they do with the larvae while they wander? Workers carry them around. As in other ant species and the honeybees we talked about recently, an army ant colony is divided into different types of ant. There’s a single queen ant, seasonally hatched males with wings who fly off as soon as they’re grown, and many worker ants. But army ants have another caste, the soldier ant. These are much larger than the worker ants and have big heads and strong, sharp mandibles. Some species of army ant forage primarily on the ground while some hunt through treetops and some underground, but they generally hunt in large, well-organized columns with soldier ants on the outside as guards. In many species, the worker ants are further divided into castes that are specialized for specific tasks.

The queen ant is an egg-laying machine. Queens of some species can lay up to 4 million eggs every month. The queen is wingless, but a new queen doesn’t need to leave the colony the way other ant species do. Instead, when new queens emerge from their cocoons as adults, the colony splits and two new colonies form from the old one, each with one of the new queens. Usually more than two queens hatch, but only two survive.

When males emerge from their cocoons, they immediately fly off and search for another colony. But a male can’t just land and mate with a queen. He has to get through her guards, and they decide whether they like him or not. If they find him adequate, they bite his wings off and bring him to the queen. After he mates, he dies. This sounds like the plot of a weird science fiction novel from the 1960s. If a colony’s queen dies, the worker ants may join another colony.

Let’s talk specifically about the Dorylus genus of army ants for a few minutes, which live in Africa and Asia. Dorylus army ants live in simply enormous colonies. When the colony goes foraging, there may be 15 million ants marching in a dense column, and they can eat half a million animals every single day.

That’s why the army ant is so feared. The column of ants is made up of worker ants in the middle with the much larger soldier ants along the edges. The columns don’t move very quickly, but the ants attack, kill, and eat any living animal they encounter that can’t run away. This includes insects, spiders, scorpions, and lots of worms, but also eggs and baby birds, other baby animals, frogs and toads, and even larger animals. What isn’t eaten on the spot is carried back to the camp to feed larvae and the queen.

Army ants are also beneficial to the ecosystem and to humans specifically in many ways. A column of army ants that marches through a village will eat so many insects that they act like a really high quality exterminating service for homes and gardens. They also scare insects and other animals that flee from the ant columns, and a lot of animals benefit from the general chaos. Birds of many species will follow army ants in flocks, grabbing insects as they flee the ants. Some birds even make special calls to alert others that army ants are on the move, so that everybody gets a chance for easy food. Even more animal species will follow the column to clean up what they leave behind, including partially eaten carcasses, animals that were killed but rejected as food, and even the feces of the birds that follow the ants.

And, of course, a lot of animals just eat the army ants. Chimpanzees make different types of tools to help them safely harvest army ants. Most commonly, a chimp will use a stick it’s modified to the right length and shape, referred to as an ant-dipping probe. It will put one end of the stick down in the column of army ants and wait until ants start climbing up the stick. When there are enough ants on the stick, it will remove the stick and eat the ants off of it. It’s an ant-kebob!

If you’re wondering why the chimps aren’t attacked by the ants, or why the ants don’t figure out they’re climbing a stick to nowhere, Dorylus army ants, like most army ant species, are all blind. They communicate by releasing pheromones, which are chemicals with specific signatures that other ants can sense, something like smells. Some species that mostly live above-ground have re-evolved sight to a limited degree.

The mandibles of Dorylus army ant soldiers are so strong, and the ant is so tenacious about holding on, that people in some East African tribes traditionally use them to stitch up wounds. The soldier ant is held so that it bites with one mandible on each side of a wound, holding the edges of skin together. Then the person severs the ant’s body from its head, killing it—but the jaws are so strong that they will continue to stay in place for several days while the wound heals.

In Central and South America, the army ant genus Eciton [ess-ih-tahn] is very similar to Dorylus. Some species can cross obstacles like streams by building a living bridge out of individuals to allow the rest of the column to cross.

Whew, okay, I should probably have made the army ant its own episode, because there’s so much cool research about it that I could just go on forever. But let’s move on to a much different insect next, a butterfly that lives in the eastern United States, especially in the Appalachian Mountains. This is the Appalachian tiger swallowtail, which has yellow wings with black stripes and a black border, and a black body. Some females have all-black wings with orange spots. When the genetic makeup of the butterfly was examined, it turns out that the species originated as a hybrid of the Eastern tiger swallowtail and the Canadian tiger swallowtail. This kind of hybridization is rare in the wild. The Appalachian tiger swallowtail lives in the mountains, usually in high elevations, and while its range overlaps with both parent species, it almost never hybridizes with either. It has inherited the Canadian butterfly’s tolerance for cold but is twice its size. Researchers estimate that the hybridization occurred around 100,000 years ago.

I learned that interesting fact about the Appalachian tiger swallowtails from the May 2018 Flying Snake issue, and let’s go ahead and learn about a mystery invertebrate I also read about in that issue of Flying Snake.

The mystery is from The Desert Magazine, which was published between 1937 and 1985. It was a monthly magazine that focused on the southwestern United States, with article titles like “Rock Hunter in the Sawange Range” and “Ghost City of the White Hills.” Both those headlines are from the January 1947 issue, which is also where the first mention of the Baby of the Desert shows up in the letters section. Flying Snake excerpts the relevant letters from that issue and a few later issues, but I got curious and found the originals online.

I’ll quote part of the original letter because it’s really weird and interesting:

“Gentlemen: Would like to ask if there is such a thing as a very poisonous desert resident called ‘Baby of the Desert,’ so named because of the resemblance of its face to that of a human baby. Whether this so-called ‘Baby of the Desert’ is supposed to be insect, reptile or rodent, I could not find out. …[I]t was considerably smaller than the Gila monster.”

The letter was signed William M. Weldon from South Pasadena, California.

The editor responded, “The question of the Baby of the Desert, Baby-face, or Niño de la Tierra, as it is variously called, came up for discussion on the Letters page of the magazine two years ago. A reader sent in a description of the fearsome beast as it had been pictured to him and asked for confirmation from someone who had seen it.”

Because of the mention of another letter asking about the Baby of the Desert, two years before, I went through the letters sections of all the 1945 issues to find the original. I couldn’t find it in 1945, but I did find a nice letter from James Mayberry in California, who found a desert tortoise with blue paint on its shell. He thought someone had brought the tortoise back from a visit to the desert. James named the tortoise Mojave but knew it needed to go home, so he sent it to the Desert Magazine. I’m delighted to say that the editor took it out to a lonely desert hill where there were other tortoises and let Mojave go. Tortoises live a long time so Mojave might still be stumping around out there, the blue paint on his shell faded in the sun.

Then I went back through the 1944 issues and found the letter in the July issue. It was from Albert Lloyd of Tulsa, Oklahoma, who wrote, “Perhaps some reader can supply authentic information about a small denizen of the deserts and mesas of the Southwest, which the Mexicans call Niño de la Tierra, or Child of the Earth. During four years of roaming around New Mexico and Arizona I was never fortunate enough to see one. But I have talked with several who claim to have seen it. They describe it as a doll-like animal, about three or four inches in length, walking on all fours, with head and face like that of an infant. They claim it will not attack you unless molested and that its bite is more deadly than a rattlesnake’s.”

The editor of the Desert Magazine suggested that the Baby of the Desert was an insect. “[I]t appears that the Baby-face is actually our old friend the yellow and black striped Jerusalem cricket or Sand-cricket, who is nocturnal and usually found under boards or stones.”

But responses in the letters section in following issues, February and April 1947, don’t agree. S.G. Chamberlin of San Fernando, California wrote, “Some years ago…we uncovered what we first thought to be a Jerusalem Cricket. The coloring was the same and it was a little more than two inches long. Later in the day a ranch hand brought us a Jerusalem Cricket and then we noticed quite a difference in the bodies and heads of the two insects. The round face of the first one did attract our attention although we didn’t think of a baby at the time. The ranch foreman placed them in different bottles to show them to a man in the Farm Bureau office who was versed in such things. He reported back that the first insect was called Vinegarones or Sun Spider and supposed to be harmless.

“At the ranch we were told that on the Mexican border there was a similar insect that is supposed to be poisonous.”

And Coila Harris of South Laguna, California wrote, “I was interested in the recent letters about ‘Baby Face.’ This is not the Jerusalem cricket or potato bug, as many believe, but could be mistaken for one of these insects. Baby-face lives down Mexico way. When we were living in El Paso, one of the weird looking bugs was found under our house. It had a body of a large Tarantula, the head was white as a bleached bone and looked like a bald headed baby, a dreadful thing. I was told at the time that Mexicans consider them so poisonous, that if bitten on the finger by one, they chop off the finger.”

Unfortunately for me, the second I saw the mention of a vinegarone, I had a good idea of what this animal might be. And I really don’t want to look at pictures of vinegaroons.

I do try very hard not to be biased against gross-looking insects, because for one thing, they aren’t hurting me and gross is in the eye of the beholder. One person’s “ooh gross” is the other person’s “Oh, that is so neat!” Spiders don’t bother me and as long as I don’t have to look closely at an invertebrate’s mouthparts and things, I’m usually okay. But I get a big case of the nopes when it comes to the vinegaroon.

The vinegaroon is an arachnid, related to spiders and scorpions. It sort of looks like a mixture of the two, although there are lots of species and they vary quite a lot. It’s also called the whip scorpion. The name vinegaroon comes from the acidic liquid it squirts from the base of its whip-like tail if it feels threatened, which smells like vinegar. It lives in tropical and subtropical parts of the Americas and Asia, with one species known from Africa. Most species prefer dark, humid areas and live in burrows in rotting wood or under rocks and leaf litter, but the giant whip scorpion lives in more arid areas in the southwestern United States and Mexico.

The giant whip scorpion grows to around 2.5 inches long, or 6 cm, not counting the long whip-like tail. Like all vinegaroons, it eats insects, slugs, and other small animals. But no one could look at it and think “baby.” It has big claw-like pedipalps in addition to six walking legs and a pair of front legs that are extremely long and thin, that it uses to feel around with. It has eyes—in fact, like spiders it has eight eyes—but it doesn’t see very well and mostly navigates by touch. It’s dark brown or black with some lighter brown markings on its abdomen.

The Jerusalem cricket looks superficially similar to the vinegaroon although it’s not an arachnid. It’s also not a cricket, and it doesn’t have anything to do with Jerusalem since it’s native to the western United States and Mexico. In fact, it’s related to the weta of New Zealand. It lives in the same sort of places that vinegaroons like, burrowing in moist soil and rotting wood, but it mostly eats decaying plant material although it will sometimes eat small insects. It can bite, although it’s not venomous or poisonous, but it can give off a horrible smell if it’s disturbed. It’s yellowish to dark reddish-brown with a black-striped abdomen and a rounded head. It also does not look anything like a baby.

BUT, while it’s known by a couple of Navajo names that translate to variations on “red skull bug,” in Spanish it’s called cara de niño, which means child’s face, or niño de la tierra.

So I think the Desert Magazine editor was right. The Baby of the Desert is the Jerusalem cricket. But I wouldn’t be a bit surprised if the Jerusalem cricket is sometimes confused with the giant whip scorpion. They’re both large nocturnal creatures with a similar body shape and coloring, that live in the same areas and occupy the same habitat. And they’re both horrifically creepy-looking. You know what? I bet you anything that “Baby of the Desert” and “baby-face” are ironic names. BAD BABY.

The Jerusalem cricket doesn’t have any kind of hearing organs akin to ears but it can sense vibrations. Instead of chirping, it drums its abdomen on the ground to attract a mate. This is what the drumming sounds like.

[Jerusalem cricket drumming]

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or just tell a friend. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 184: The Mosquito!

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Thanks to Kaiden who suggested we learn about mosquitoes this week! You know what eats a lot of mosquitoes? Bats! If you don’t already listen to the excellent podcast Varmints!, jump on over to it to listen to last week’s episode about bats! I cohosted with Paul and had a great time, and I know you’ll like the episode and the podcast in general. It’s family friendly and lots of fun!

Further reading:

The Paleobiologist Who Inspired the Science in ‘Jurassic Park’

SMACK SMACK SMACK SMACK:

Mosquito larvae:

An elephant mosquito in amber:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week we have a great listener suggestion from Kaiden, who wants to learn about mosquitoes! This is especially great because last week I was a guest co-host on the awesome podcast Varmints!, and we talked about bats! As you may know, bats eat a LOT of mosquitoes. I’ll put a link to the Varmints! page in the show notes in case you don’t already subscribe. I think you’d like it.

The mosquito is a common insect that lives all over the world, except for Antarctica and Iceland. There are something like 3,500 species of mosquito known. In areas where it gets cold in winter some species of mosquito may hibernate, but most enter a state called diapause. This basically means that any eggs and larvae delay their development until it warms up, then develop into adults normally.

The mosquito is a type of fly, and like other flies it only has one pair of wings. Most mosquito species are only 3-6 millimeters long, gray or black in color, with long, extremely thin legs and narrow wings. The largest known species of mosquito is called the elephant mosquito, which can grow up to 18mm long. That’s almost three-quarters of an inch. Its wingspan is even larger, 24 mm, which is just shy of a full inch across.

The mosquito eats nectar. Oh, sorry, that’s the male mosquito. The female mosquito is the one who drinks blood, and she needs the blood to develop her eggs. But in fact, the female mosquito also eats nectar too, and mosquitoes even help pollinate some flowers. Some species of mosquito can develop eggs without blood, but most need the extra protein and nutrients that blood provides. In some species, the female can produce one clutch of eggs without blood, but she has to have blood to develop more eggs.

The female mosquito has a long, thin proboscis that she uses to pierce the skin of an animal and suck its blood, although the process is a lot more complicated than it sounds. The proboscis is made up of a sheath that protects the other mouthparts, including a pair of mandibles and a pair of maxillae. The mandibles and maxillae are actually the parts that cause the bite. If you look at a mosquito that has landed on your arm and is biting you, it looks like the proboscis must be stuck in your skin like a teensy hypodermic needle, but what you’re seeing is the proboscis sheath. The mosquito touches the sheath to your skin and bends it back slightly, which exposes the mouthparts and acts as a guide as the mouthparts bite you. The mandibles are the pointy ones and the maxillae have flattened ends. The mosquito moves her head slightly back and forth to lever them all into your skin, and the only reason this doesn’t hurt like crazy is because they’re so incredibly tiny, plus it happens very quickly.

Once the mouthparts have pierced the skin, the mosquito injects saliva, which contains proteins that act as an anticoagulant so the blood continues to flow without clotting. The itching and swelling associated with a mosquito bite are due to this saliva, which your body reacts to as a foreign substance, which of course it is.

This biting and saliva injecting process actually takes place very quickly, and then the mosquito sucks the blood up. She can hold up to three times her weight in blood. Not only that, but if she’s not disturbed, she will start digesting the blood quickly and will eject as much of the liquid as possible to make room for more blood, since she doesn’t need the liquid part of the blood.

Vampire bats do this too, if you’ve listened to our vampire bats episode or the new Varmints! episode about bats. They digest the blood they drink quickly, then pee out the excess liquid so they’re light enough to fly. But in the case of the mosquito, she just needs as many nutrients from the blood as possible to develop her eggs. That’s why a single mosquito may bite you numerous times. She needs to fill her stomach with the nutritious solids in the blood while excreting as much extra liquid as she can.

Once she has all the blood she needs, the mosquito will hide somewhere for a few days while her eggs develop. Then she’ll fly out to find a good place to lay them.

Mosquitoes lay their eggs in water, usually stagnant water like small ponds. The larvae stay in the water after they hatch. You may have seen mosquito larvae, since they’re distinctive. They’re only a few millimeters long and skinny, with a bristly-looking head. The larvae come to the surface to breathe through a siphon in the abdomen, so they will hang head downward just under the water’s surface. If something startles them, the larvae will curl up and sort of jerk their way through the water. Mosquito larvae eat algae and other tiny food.

Even after a larva pupates, it can still move around in the water. It doesn’t eat, but it needs to breathe, so it will hang just under the water with the breathing siphon in its abdomen at the surface, just as it did as a larva. After a few days, the pupa splits open and the adult mosquito emerges. Females fly off but the males stay in a group, and female mosquitoes join the group to find a mate.

The mosquito’s feet are adapted to allow it to stand wherever it likes. Its feet have microscopic hairy pads like those found on gecko toes that allow it to stick to smooth surfaces, and it also has microscopic hooks that help it stay in place on skin. And it also has feathery scales on its feet that are only a few microns across that allow it to stand on water. Since some species of female mosquitoes lay their eggs directly into water, being able to stand on the water’s surface is useful.

Mosquitoes spread a lot of diseases, which get injected along with the anticoagulant saliva. These include malaria, West Nile virus, zika, yellow fever, dengue fever, and many others. An estimated two million people die of mosquito-spread diseases every year, which makes the mosquito the deadliest animal in the world.

Because mosquitoes are such disease spreaders, people keep trying to figure out better ways to kill them off or at least stop them from spreading disease. One way to stop mosquitoes from spreading is to make sure there is no stagnant water around your house to breed new mosquitoes. A female mosquito will lay her eggs in even small amounts of water, such as an empty drink can that has collected rainwater, so getting rid of trash helps. In the past, people tried poisoning water or spraying insecticides, but this isn’t always very effective against mosquitoes and also kills other insects that may be beneficial.

But as genetic engineering becomes more sophisticated, scientists have discovered new ways to help stop mosquitoes from spreading disease.

For example, let’s talk briefly about dengue fever. I won’t go into symptoms or anything like that, don’t worry. It’s mostly a tropical disease found primarily in parts of Asia, Africa, and Central and South America, and it’s spread by the yellow fever mosquito, which also spreads many other diseases. People do die from dengue fever but most recover and are fine, but of course no one wants to get sick. There’s a vaccine as of 2016, but it’s not fully effective and has some side effects.

To help stop the spread of dengue fever, people have tried releasing animals into standing water that eat mosquito larvae, such as guppies native to the area. This has actually helped. In northern Vietnam, copepods that eat mosquito larvae were introduced into water storage tanks and did such a good job that the yellow fever mosquito was actually eliminated in the area for years. Some species of elephant mosquitoes, which you may remember from a few minutes ago are the largest mosquitoes in the world, don’t drink blood at all. Its larvae eat the eggs and larvae of other mosquito species, which gives it enough nutrients as an adult to lay plenty of eggs. One species of elephant mosquito specializes in eating the larvae of the yellow fever mosquito and has been introduced into some areas to help control its population.

Genetically modified male yellow fever mosquitoes have been introduced into the wild to mate with ordinary female mosquitoes in many places. The males contain a gene that causes larvae to die before reaching adulthood, and it has helped quite a bit. The yellow fever mosquito population has been reduced by over 90% in the places where the males were released, but it doesn’t affect other mosquito species that don’t carry the diseases. The problem is that genetically modified males have to be continuously bred and released in order for the program to keep working.

Very recently, as of January of 2020, scientists have engineered an antibody for the yellow fever mosquito. It basically stops the dengue virus from replicating in the mosquito, which means it can’t be passed to a human. There have been attempts to do this before, but it was only effective for one or another strain of the dengue virus. This new antibody is effective against all strains of the virus. This will help people while not killing the mosquitoes. The team is also working to engineer an antibody for other mosquito-borne viruses.

So, is it true that some people get targeted by mosquitoes more than others? As someone who seems to be a mosquito magnet when I go outside in the evening when mosquitoes are most active, I would say yes–and science agrees with me. Mosquitoes are attracted to some people more than others. The mosquito has a good sense of smell and can track animals by smelling their sweat and the carbon dioxide they exhale. They also tend to prefer people with type O blood and high body heat, but how attractive a person is to a mosquito depends on genetic traits too.

Some species of mosquito prefer some types of animals over others too. Some feed almost exclusively on birds, for instance. But in a pinch, a female mosquito will bite just about any animal, and it doesn’t even need to be warm-blooded. Mosquitoes will bite reptiles, amphibians, and even fish if they’re partly out of water. Some mosquitoes will even bite caterpillars. Caterpillars don’t have blood, but they do have hemolymph, which is just as nutritious to the mosquito.

Occasionally mosquitoes are found in amber, which as you may recall from episode 108 is fossilized tree resin. The oldest known was found in 79-million-year-old amber, so that means that yes, it could have bitten a dinosaur. But even if it still contained genetic material from dinosaur blood, and even if scientists were able to extract the dinosaur genetic material, it would be damaged DNA. Without a full genome of that particular dinosaur to compare against, we wouldn’t be able to repair the DNA sufficiently to actually clone a dinosaur. But we might be able to clone the actual mosquito and compare it to modern mosquitoes to learn more about them! It’s not as exciting as a dinosaur, but on the other hand there’s not a lot of danger of being stomped on or eaten by a mosquito.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or just tell a friend. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

 

Episode 183: BEES! AKA honey and “honey”

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Thanks to Linnea for suggesting bees! Obviously we can’t learn about ALL 20,000 bee species in this episode, but we’ll learn about the honeybee and some other interesting bees!

Further reading:

Bee friendly? Pollinating California’s almond crop

The vulture bee

Western honeybees on a honeycomb:

A vulture bee thinking about “honey”:

The wholesome, solitary ivy bee:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

It’s August and we’re kicking off a full month of our spineless friends! That’s right, it’s Invertebrate August, and to get us started, we’re going to learn about some really interesting bees. Thanks to Lynnea for the topic suggestion and some great links!

Bees live all over the world and there are thousands of species, something like 20,000 of them. The only place in the world that doesn’t have any bees is Antarctica, which doesn’t have much of anything.

When most of us think of bees, we think of the honeybee. The honeybee is one of the few invertebrates that are domesticated. People really like honey, and at some point humans realized that if they made pets of the bees that make honey, getting at the honey was a lot easier on both the people and the bees. We know that ancient Egyptians had already domesticated the western honeybee because there are tomb paintings of beekeepers and hives.

The honeybee is native to Europe and Asia, and there are about 30 species. The western honeybee is the most widespread. It lives in a structured colony with a queen, worker bees, and a few drones. The worker bees are all females but they don’t mate and lay eggs. Only the queen is fertile, and the drones are males who mate with the queen. Different worker bees have different roles in the hive. Some gather nectar and pollen from flowers, while some take care of the queen’s eggs and babies or build new honeycombs. All worker bees have stingers, which they use to defend the hive. Honeybees are striped yellow and black to warn other animals that they’re dangerous.

Worker bees make honey by partially digesting nectar, then spreading it in empty honeycomb cells to partially dry. When it’s the right consistency, the workers cap the cells. Honey is antibacterial and anti-fungal and will last pretty much forever in the hive. Eventually it will crystallize, though, and the bees will remove crystallized honey from the hive since they can’t eat it that way. Bees make honey to eat, and they need lots of it so they have extra for wintertime and bad weather when the bees stay inside.

In the wild, the honeybee builds its nest in crevices, such as a hollow tree or the rafters of your attic. Worker bees secrete wax from glands on the abdomen and use it to build honeycomb, which is a sheet of hexagonal cells. Hexagonal means six-sided, and each cell does have six sides. A hexagonal shape is the most efficient use of materials, since each side of the hexagon is shared with another cell instead of the bees having to make six sides for each cell. When they finish making one cell, they’ve already got one side made for six other cells that will adjoin that first cell, sort of like the walls separating rooms in your home.

The queen bee lays her eggs in honeycomb cells. An egg hatches into a larva and is fed by worker bees. All bee larvae get fed a secretion called royal jelly for the first three days after hatching. Royal jelly is high in protein. After three days, most larvae will only get fed a mixture of pollen and nectar called bee bread. The only exception is if the colony has eggs that are intended to grow into new queens. Queen bee larvae continue to get fed royal jelly, since they need the extra protein. The established queen bee of the hive also eats royal jelly.

Honeybees who live in an area with lots of flowers can produce so much honey that they completely fill up their hive. In domesticated bees, that’s when the beekeeper harvests the honey, and will usually return the emptied honeycombs to the hive for the bees to reuse. In bees living wild, if the colony stores so much honey that it’s running out of room for eggs, this will trigger a swarm. The queen leaves with about half the worker bees to find a new home. The workers who remain will continue to feed royal jelly to the newly hatched larvae, which means they develop into new queen bees. The workers have to modify the honeycomb cells for queen bees, which are bigger than other bees and don’t fit in an ordinary-sized cell.

The queen bee larvae pupate and metamorphose into mature bees. New queens chew an opening in their cells, which the worker bees have sealed shut, and each immediately fights all the other new queen bees. If one queen emerges before the others, she will kill the others before they have even finished metamorphosing.

The surviving queen takes over, but she can’t lay eggs that will develop into worker bees yet. She has to mate first. If you listened to episode 175 where we talked about flying ants, you’ll remember that in some species of ant, new queens have a nuptial flight where they mate with males, then store the sperm they collect to use for the rest of their life. Honeybees do this too. When weather conditions are right, the new queen will leave the hive and release pheromones that attract males from various hives in the area. A queen may have several nuptial flights before she has collected enough sperm, which she keeps in a special organ in her body. Then she returns to her hive to start laying eggs that will develop into new worker bees.

Bees are important as domesticated animals not just because we all like honey, but because bees are really good pollinators. The honeybee, and some other bees, have a structure often referred to as a pollen basket on the rearmost legs. It’s a sort of divot in the leg, like a built-in pocket, surrounded by hairs. As the bee crawls around on a flower collecting nectar, pollen sticks to its fuzzy body. The bee gives its front legs a lick and uses them to brush the pollen from its body, then presses the pollen into its pollen baskets. But, of course, it can’t get every grain of pollen off, and some of it rubs off onto the next flower’s stigma, pollinating it.

Some crops, like almonds, depend on beekeepers who bring hives of bees to each orchard in spring. The bees pollinate the almond flowers so they can develop into delicious almonds, which makes the orchard owners happy, and they collect lots of nutritious pollen, which makes the bees and beekeepers happy. Some beekeepers move their bee hives from place to place every spring to help farmers pollinate various crops, but the almond crop is a big deal since the California orchards produce more than 80% of the world’s almonds every year. Beekeepers depend on the money they receive from orchard owners to bring their bees to the orchards, and the orchard owners depend on those bees to make sure there are lots of almonds to harvest later in the year.

But increasingly, there aren’t enough honeybees to pollinate the expanding almond orchards. Colony Collapse Disorder has been known for over a century under various names, but it’s been on the increase since around 2006. A colony will be fine, and then suddenly almost all of the worker bees will just leave and never return. The queen and a few worker bees stay behind. It’s like the opposite of a swarm. It was once known as disappearing disease, but it doesn’t appear to be an actual disease that bees can catch.

Researchers still don’t know what precisely causes colony collapse. The bees left behind are healthy and the hive contains plenty of food. And the disorder doesn’t just happen in one place or one country, it’s happening all over, especially in North America, Europe, and Asia, where the western honeybee is most commonly kept by beekeepers.

It’s probable that a number of factors contribute to colony collapse, from pesticide use and climate change to declining biodiversity and known honeybee parasites and diseases. Researchers suggest that a colony that’s already under stress due to one or more of these factors is less healthy to start with, and the addition of another stress factor can cause worker bees to abandon the hive. Pesticides, herbicides, and fungicides seem to be major contributing factors.

Entomologists, beekeepers, almond farmers, and many others are working to learn more about what causes colony collapse disorder. In the meantime, they’re trying lots of things to improve bee health in general. Many almond farmers have stopped spraying insecticides on their trees until after the bees have finished pollinating the almond flowers, and those who do have to use insecticides make sure they use kinds that are minimally harmful to bees and then they only spray at night when the bees are safely in their hives. Some farmers have started growing weeds and other flowering plants near the almond trees to attract wild bees, which reduces their dependence on domesticated honeybees.

So do other species of bee produce honey? Nope, only honeybees produce honey. Oh, and the honey wasp. That’s right, there are a few species of wasp that produce honey that’s very similar to that made by honeybees. The wasps are native to Central and South America, with one species living in parts of southwestern North America. They prefer humid forests, including rainforests, and they make paper nests in trees the same way many other wasps do. They eat the honey but they also eat nectar and other insects. They’re actually beneficial to farmers since they eat lots of crop pests like boll weevils and leaf miners. They also help pollinate plants. But they are definitely not domesticated and they will sting you like whoa, and they also don’t produce very much honey compared to honeybees.

Most bees eat nectar and pollen, but will sometimes also eat juice from fruit they might happen to find. But the vulture bee eats meat from dead animals, just like a tiny vulture with six legs. It’s a tropical bee that lives in parts of North America, and not only is it related to the honeybee, it actually makes honey. Sort of. It’s not vegetarian honey, let’s put it that way.

There are three species of vulture bee, all of which have been known to science for centuries, but no one realized they ate meat until 1982. The vulture bee has also lost its pollen baskets, since it lives in areas where pollen is hard to come by. That’s why it eats meat instead, since it supplies the bees with protein in the absence of nutritious pollen.

If a vulture bee can’t find a dead animal to eat, it will sometimes sneak into wasp nests and eat young wasps. Since wasps often do the same thing to bees, that seems fair. Oh, and the vulture bee doesn’t have a sting.

The vulture bee’s mandibles have sharp tooth-like points that help them cut into meat. When a bee finds a dead animal, it will actually burrow into the carcass through its eyes. It also releases pheromones that help the other bees from its colony find the carcass. The bees can strip a carcass the size of, say, a big frog, in a few hours and will even chase flies away.

But the vulture bee can’t digest the meat, not as it is. It uses saliva mixed with nectar it’s eaten to break the meat down into a liquid, which it slurps up and brings back to the hive. Like honeybees partially digesting nectar, the vulture bee partially digests the liquefied meat, which mixes it with enzymes from the bee’s body. Then it regurgitates the liquid to dry in honeycomb cells until it has the consistency of honey, which it is. But I would not eat it.

It turns out that when a bee larva pupates, it spins a cocoon. Even honeybees and other social bees do this, despite the fact that they pupate in cozy little hexagonal cells. And it turns out that the silk that social bees and ants spin to make the cocoon is very different from spider and moth silk. The proteins that make up the silk consist of coiled strands that are also coiled around each other, making the silk incredibly strong but still light-weight. Spider and moth silk is much smoother since it’s made up of a larger protein that is sort of a sheetlike structure.

Since there are so many species of bee in the world, there’s simply no way I can do more than scratch the surface of knowledge and this episode is already getting long. We haven’t even talked about mason bees, and I’d planned to focus on them this time but got sidetracked by honeybees! We’ll save mason bees for another time, but let’s finish up with a solitary bee—that is, a type of bee that doesn’t live in colonies.

The ivy bee lives throughout much of Europe, including the UK, and is a fairly large bee. The female grows to around 13 millimeters long on average although males are smaller. At first glance it looks like a big honeybee but has more vivid black and yellow-orange stripes on its abdomen. If you remember episode 160, where we talked about the Osima avosetta bee that makes her nest out of flower petals, the ivy bee will seem familiar to you. The female digs little nests in the ground to lay her eggs in, one egg per nest, and she leaves nectar and pollen for the babies to eat when they hatch. Then the larvae pupate and emerge as adults in late summer.

The ivy bee gets its name because it mostly eats the pollen and nectar of the ivy plant, which flowers in autumn. Hundreds of ivy bees may swarm over a bank of ivy but they’re not dangerous at all. The bees help pollinate the ivy flowers, which in turn means that there will be plenty of ivy berries in winter for birds to eat. The birds eat the berries but poop out the seeds, which means more ivy will grow. Teamwork!

Quite often you’ll hear people talk about saving the bees, and that’s important. Wild bees of all kinds are declining in number due to habitat loss and pesticides. The best thing you can do to help is to plant flowers, especially flowers native to your area. Even if you can only plant a small flower garden, you will definitely be helping your local wild bees—and butterflies, moths, and other beneficial insects. Teamwork again! You can be part of the bee team!

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or wherever you listen to podcasts. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 182: The Coconut Crab and Friends

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Join us this week for some interesting crabs! Thanks to Charles for suggesting the aethra crab!

Aethra crabs look like little rocks, although some people (who must be REALLY hungry) think they look like potato chips:

A hermit crab using a light bulb bottom as an inadequate shell:

The tiniest hermit crab:

Gimme shell pls:

THE BIGGEST HERMIT CRAB, the coconut crab. It really is this big:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

We have a bunch of crustaceans this week! I’m sorry I’ve taken so long to get to Charles’s suggestion of aethra crabs, so we’ll start with those.

There are four species of aethra crabs alive today, and they live in warm, shallow coastal waters. They like areas with lots of rocks on the sea floor, because the crabs look like small flattened rocks. They can tuck their legs under their carapace so that they don’t show at all, and often algae and other marine animals like barnacles will attach to the carapace, increasing the crab’s resemblance to a little rock. What eats rocks? Nothing eats rocks! So the aethra crab is safe as long as it stays put with its legs hidden. It lives throughout much of the world’s tropical oceans, especially around islands and reefs in South Asia, but also around Australia, Mexico, and Hawaii.

We don’t know a whole lot about aethra crabs, not even how many species there really are. There are probably undiscovered species that no one has studied yet, but we do know they used to be even more widespread than they are today. Twelve million years ago, for instance, a species of aethra crab lived in what is now Ukraine, with fossil remains only described in 2018.

Most aethra crabs only grow a few inches across, or maybe 6 cm, but the walking rock crab of Mexico can grow to 6.3 inches across, or 16 cm across. It’s light brown with lighter and darker speckles that give it a mottled appearance like a small rock.

Because they’re so flattened with rounded edges, and because some species are pale in color, aethra crabs are sometimes called potato chip crabs. I don’t like that name because it makes them sound tasty and not like little rocks. I think we have established that they really look like little rocks.

That’s just about all I can find out about the aethra crab, so if you’re thinking of going into biology and aren’t sure what subject to study, may I suggest you focus your attention on the aethra crab and bring knowledge about them to the world.

So let’s move on to a different type of crab, the hermit crab. A big part of being a crab is evolving ways to not be eaten. I mean, that’s what every animal wants but crabs have some novel ways of accomplishing it. Some crabs look like tiny rocks, some crabs hide in shells discarded by other animals.

There are hundreds of hermit crab species, which are generally grouped as marine hermit crabs and land hermit crabs. There’s also a single freshwater hermit crab that lives on a single island, Espiritu Santo, in the south Pacific, and in fact only in a single pool on that island. It was only described in 1990 and is small, less than an inch long, or about two and a half cm. It uses the discarded shells of a snail that also lives in its pool.

That’s the big thing about a hermit crab: it uses the shells of other animals as a temporary home. Like all crabs, the hermit crab is an invertebrate with an exoskeleton. But unlike most crabs, its abdomen isn’t armored. Instead it’s soft and vulnerable, but that’s okay because most of the time it’s protected by a shell that the crab wears. In most species the abdomen is actually curved in a spiral shape to better fit into most shells.

When a hermit crab finds an empty shell, it may quickly slip out of its current shell and into the new shell to see if it’s a good fit. Ideally the shell is big enough for the crab to hide in completely, but not so big that it’s awkward for the crab to carry around. If it likes the new shell it will abandon the old shell, but if it doesn’t like the new shell it will just go back to its old one. But the important thing is that it has a shell, so it spends as little time without a shell as possible. In fact, if it can’t find a shell of the right size, a hermit crab will make do with anything it can find, such as a plastic bottle, an old tin can, or other trash. But it’s safest inside a real shell. Sometimes two hermit crabs of about the same size will fight over a shell. You wouldn’t think that the ability of a hermit crab to find a good shell would be something humans can affect, but in some areas, so many shells are collected to sell as souvenirs that hermit crabs really don’t have very many left to choose from and have to use trash or pieces of driftwood instead.

Other than the freshwater hermit crab, marine hermit crabs all live in the ocean. Some species live in shallow water, others in deep water, and often around reefs. There are even a few species that are specialized to live in permanent structures on the sea floor, such as sponges or the abandoned burrows of various worms. Land hermit crabs spend most of their time on land, although they have to keep their gills wet.

People sometimes keep hermit crabs as pets, either in an aquarium for marine species, or a special terrarium for land species. Some species can live for decades if given proper care. Because a pet hermit crab is safe, it doesn’t really matter what kind of shell it wears as long as it’s comfortable, so people will sometimes give their pets imitation shells that are clear so they can see the crab’s interesting-shaped abdomen. You can also get fake shells that are shaped like skulls or tiny houses. There’s a picture that goes around sometimes online of a hermit crab using a real human skull as a shell, but that’s actually fake. Not only is the skull not real, the hermit crab isn’t real. It’s a sculpture.

The biggest species of hermit crab is the coconut crab, also sometimes called the robber crab since when it finds something that might be food, it will carry it away to investigate it. It’s not just the biggest hermit crab, it’s the biggest arthropod that lives on land. An arthropod is any invertebrate with an exoskeleton and segmented body. That includes all insects and crustaceans and arachnids, and so on.

The coconut crab has a legspan over three feet across, or about a meter. It can weigh up to nine pounds, or 4 kg. Researchers think it’s literally as big as an arthropod can grow these days and continue to live on land. It’s a bulky, strong crab that ranges in color from reddish-orange or brown to blue-gray, sometimes with white markings.

The coconut crab uses shells as protection when it’s young, but as it grows larger, it outgrows most shells available. Instead, it develops a tough exoskeleton on its abdomen. It also develops lungs, so an adult coconut crab can actually drown if it gets trapped underwater for long enough—generally about an hour. It still has gills, but they’re tiny and not very efficient.

Its lungs aren’t like those of most other arthropods. In fact it only has one lung, called a branchiostegal lung, that has traits of true lungs but also traits of gills. It doesn’t breathe like vertebrates do; instead, its lung absorbs oxygen from the air passively. To do this properly, though, the lung tissue needs to be moist. A coconut crab uses its hindmost pair of legs to dip water up and wipe it over the lung tissue, which is inside a cavity in the cephalothorax. This is the main part of the body as opposed to the abdomen. This last pair of legs is tiny compared to the other eight legs, and female coconut crabs also use these legs to tend their eggs. Usually the last pair of legs aren’t even visible, since the crab usually keeps them tucked in the lung cavity. The other legs are much larger, and the first pair of legs ends in claws like other crabs.

The coconut crab lives on lots of islands in the Indian and Pacific Oceans and used to live in Australia and on many more islands. But it’s a big crab and that means it provides a lot of food, so humans have hunted it to extinction in many areas. It’s increasingly rare in many places as a result of hunting and habitat loss. But the coconut crab isn’t helpless. If a coconut crab snaps its pincers on, for instance, a person’s thumb, it will hold on tenaciously, probably while the person flails around in panic and pain. Not only that, but sometimes a population of coconut crabs will feed on plants that contain toxins, such as the sea mango, and will retain the toxins in its body. If a person eats a toxic crab, they may get sick from the poison.

It’s called the coconut crab because it eats coconuts, but it actually doesn’t prefer coconuts. It especially likes bananas. It also eats seeds, nuts, and other plant material, but it’s an omnivore and will eat carrion, other crabs, baby turtles, and even birds. Its antennae have evolved to detect chemicals in the air instead of in the water, which means it has a good sense of smell and can track the smell of rotting fruit or meat from a long distance away.

Even the biggest crabs can climb well and will climb trees, sometimes to get away from potential predators, but sometimes to catch birds. The quickest way to get out of a tree after climbing it is just by falling, and the coconut crab often does this on purpose. Its exoskeleton is so tough that it can fall some 15 feet, or 4.5 meters, without injury. And yes, sometimes a coconut crab will use their claws to break into a coconut to eat it, but it takes a long time—sometimes days. The coconut crab is mostly nocturnal, but it will come out during the day if it’s hungry, especially if it’s raining or foggy out.

A female coconut crab glues her fertilized eggs under her abdomen and carries them around for a few months as they develop. When they’re ready to hatch, she releases them into the ocean. After they hatch, the larvae drift around for several weeks, eating tiny specks of food. As a baby coconut crab grows and develops through its juvenile stages, which generally takes several weeks, it finally settles to the sea floor and finds a shell to hide in, just like other hermit crabs do. If it can’t make it to shore on its own, it will climb onto a floating log or bunch of floating seaweed or a floating coconut, which eventually carries it to shore. It needs to be on shore because only the larvae can swim, and once it reaches its adult stage it has to breathe air.

Like other arthropods, the coconut crab has to molt its exoskeleton periodically as it grows, since the exoskeleton can’t grow. After it molts, it takes up to three weeks for the new exoskeleton to harden. During this time the crab hides in a burrow it digs, because even a gigantic coconut crab is soft and vulnerable without its exoskeleton. It lines its burrow with coconut fibers, which absorb water and helps keep the crab’s lung tissue moist while it rests. The crab will also stop up the entrance to its burrow with one of its claws, to help keep it safe and reduce the loss of moisture from the burrow. The coconut crab continues to grow throughout its life, which can be extremely long—more than sixty years. A big coconut crab’s only predator is people, and frankly I would not want to tangle with one.

Let’s finish the episode with a mystery crab. Wallowa Lake in Oregon, in the United States, is about three and a half miles long, or 5.6 km, and three-quarters of a mile across, or 1.2 km, and is 300 feet at its deepest point, or 91 meters. After gold was found in the area in the late 19th century, the Wallowa band of the Nez Perce was forced out of their ancestral home by the U.S. government, despite the treaties in place to stop that kind of thing happening. Funny how often that happens. Anyway, the gold rushers who moved in spread stories about giant crabs that lived in the lake, which would crawl out at night to grab cattle and pull them into the water to eat.

But the lake was created from melting glaciers near the end of the Pleistocene ice ages, around 11,000 years ago. It’s never been connected to the ocean and is in fact 4,300 feet above sea level, or 1,300 m. It’s also in a part of the world that experiences bitterly cold winters. All freshwater crabs are tropical or subtropical and can’t survive in cold water. Plus, of course, even the biggest coconut crab isn’t big enough to drag a cow into the water.

So the Wallowa Lake crabs are probably just tall tales. But, you know, maybe be careful if you go swimming in the lake at night, just in case.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or wherever you listen to podcasts. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 181: Updates 3 and a lake monster!

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It’s our annual updates and corrections episode, with a fun mystery animal at the end!

Thanks to everyone who contributed, including Bob, Richard J. who is my brother, Richard J. who isn’t my brother, Connor, Simon, Sam, Llewelly, Andrew Gable of the excellent Forgotten Darkness Podcast, and probably many others whose names I didn’t write down!

Further reading:

Northern bald ibis (Akh-bird)

Researchers learn more about teen-age T. rex

A squid fossil offers a rare record of pterosaur feeding behavior

The mysterious, legendary giant squid’s genome is revealed

Why giant squid are still mystifying scientists 150 years after they were discovered (excellent photos but you have to turn off your ad-blocker)

We now know the real range of the extinct Carolina parakeet

Platypus on brink of extinction

Discovery at ‘flower burial’ site could unravel mystery of Neanderthal death rites

A Neanderthal woman from Chagyrskyra Cave

The Iraqi Afa – a Middle Eastern mystery lizard

Further watching/listening:

Richard J. sent me a link to the Axolotl song and it’s EPIC

Bob sent me some more rat songs after I mentioned the song “Ben” in the rats episode, including The Naked Mole Rap and Rats in My Room (from 1957!)

The 2012 video purportedly of the Lagarfljótsormurinn monster

A squid fossil with a pterosaur tooth embedded:

A giant squid (not fossilized):

White-throated magpie-jay:

An updated map of the Carolina parakeet’s range:

A still from the video taken of a supposed Lagarfljót worm in 2012:

An even clearer photo of the Lagarfljót worm:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This is our third annual updates and corrections episode, where I bring us up to date about some topics we’ve covered in the past. We’ll also talk about an interesting mystery animal at the end. There are lots of links in the show notes to articles I used in the episode’s research and to some videos you might find interesting.

While I was putting this episode together, I went through all the emails I received in the last year and discovered a few suggestions that never made it onto the list. I’m getting really backed up on suggestions again, with a bunch that are a year old or more, so the next few months will be all suggestion episodes! If you’re waiting to hear an episode about your suggestion, hopefully I’ll get to it soon.

Anyway, let’s start the updates episode with some corrections. In episode 173 about the forest raven, I mentioned that the northern bald ibis was considered sacred by ancient Egyptians. Simon asked me if that was actually the case or if only the sacred ibis was considered sacred. I mean, it’s right there in the name, sacred ibis.

I did a little digging and it turns out that while the sacred ibis was associated with the god Thoth, along with the baboon, the northern bald ibis was often depicted on temple walls. It was associated with the ankh, which ancient Egyptians considered part of the soul. That’s a really simplistic way to put it, but you’ll have to find an ancient history podcast to really do the subject justice. So the northern bald ibis was important to the ancient Egyptians and sort of considered sacred, but in a different way from the actual sacred ibis.

In episode 146 while I was talking about the archerfish, I said something about how I didn’t fully understand how the archerfish actually spits water so that it forms a bullet-like blob. Bob wrote and kindly explained in a very clear way what goes on: “Basically, the fish spits a stream of water, but squeezes it so that the back end of the stream is moving faster than the front. So it bunches up as it flies and hits the target with one big smack. Beyond that, the water bullet would fall apart as the back part moves through the front part of the stream, but the fish can apparently judge the distance just right.” That is really awesome.

In another correction, Sam told me ages ago that the official pronouns for Sue the T rex are they/them, because that’s what Sue has requested on their Twitter profile. I forgot to mention this last time, sorry.

While we’re talking about Tyrannosaurus rex, researchers have IDed two teenaged T rex specimens found in Montana. Originally paleontologists thought the specimens might be a related species that grew to a much smaller size, Nanotyrannus, but the team studying them have determined that they were juvenile T rexes. To learn how old the specimens were and how fast they grew, they cut extremely thin slices from the leg bones and examined them under high magnification.

The study of fossil bone microstructure is called paleohistology and it’s a new field that’s helped us learn a lot about long-extinct animals like dinosaurs. We know from this study that T rex grew as fast as modern warm-blooded animals like birds and mammals, and we know that the specimens were 13 and 15 years old when they died. T rex didn’t reach its adult size until it was about twenty, and there are definite differences in the morphology of the juvenile specimens compared to an adult. The young T rexes were built for speed and had sharper teeth to cut meat instead of crush through heavy bones the way adults could. This suggests that juvenile T rexes needed to outrun both predators and smaller prey.

In other fossil news, Llewelly sent me a link about a pterosaur tooth caught in a squid fossil. We know pterosaurs ate fish because paleontologists have found fossilized fish bones and scales in the stomach area of pterosaur remains, but now we know they also ate squid. The fossil was discovered in Bavaria in 2012 and is remarkably well preserved, especially considering how few squid fossils we have. One of the things preserved in the fossil is a sharp, slender tooth that matches that of a pterosaur. Researchers think the pterosaur misjudged the squid’s size and swooped down to grab it from the water, but the squid was about a foot long, or 30 cm, and would have been too heavy for the pterosaur to pick up. One of its teeth broke off and remained embedded in the squid’s mantle, where it remains to this day 150 million years later.

And speaking of squid, the giant squid’s genome has been sequenced. Researchers want to see if they can pinpoint how the giant squid became so large compared to most other cephalopods, but so far they haven’t figured this out. They’re also looking at ways that the giant squid differs from other cephalopods and from vertebrates, including humans, to better understand how vertebrates evolved. They have discovered a gene that seems to be unique to cephalopods that helps it produce iridescence.

The Richard J. who is my brother sent me an article about giant squid a while back. There’s a link in the show notes. It has some up-to-date photos from the last few years as well as some of the oldest ones known, and lots of interesting information about the discovery of giant squid.

The Richard J. who is not my brother also followed up after the magpies episode and asked about the magpie jay. He said that the white-throated magpie jay is his favorite bird, and now that I’ve looked at pictures of it, I see why.

There are two species of magpie jay, the black-throated and the white-throated, which are so closely related that they sometimes interbreed where their ranges overlap. They live in parts of Mexico and nearby countries. They look a little like blue jays, with blue feathers on the back and tail, white face and belly, and black markings. Both species also have a floofy crest of curved feathers that looks like something a parrot would wear. A stylish parrot. Like other corvids, it’s omnivorous. It’s also a big bird, almost two feet long including the long tail, or 56 cm.

In other bird news, Connor sent me an article about the range of the Carolina parakeet before it was driven to extinction. Researchers have narrowed down and refined the bird’s range by researching diaries, newspaper reports, and other sightings of the bird well back into the 16th century. It turns out that the two subspecies didn’t overlap much at all, and the ranges of both were much smaller than have been assumed. I put a copy of the map in the show notes, along with a link to the article.

One update about an insect comes from Lynnea, who wrote in after episode 160, about a couple of unusual bee species. Lynnea said that some bees do indeed spin cocoons. I’d go into more detail, but I have an entire episode planned about strange and interesting bees. My goal is to release it in August, so it won’t be long!

In mammal news, the platypus is on the brink of extinction now more than ever. Australia’s drought, which caused the horrible wildfires we talked about in January, is also causing problems for the platypus. The platypus is adapted to hunt underwater, and the drought has reduced the amount of water available in streams and rivers. Not only that, damming of waterways, introduced predators like foxes, fish traps that drown platypuses, and farming practices that destroy platypus burrows are making things even worse. If serious conservation efforts aren’t put into place quickly, it could go extinct sooner than estimated. Conservationists are working to get the platypus put on the endangered species list throughout Australia so it can be saved.

A Neandertal skeleton found in a cave in the foothills of Iraqi Kurdistan appears to be a deliberate burial in an area where many other burials were found in the 1950s. The new skeleton is probably more than 70,000 years old and is an older adult. It was overlooked during the 1950s excavation due to its location deep inside a fissure in the cave. The research team is studying the remains and the area where they were found to learn more about how Neandertals buried their dead. They also hope to recover DNA from the specimen.

Another Neandertal skeleton, this one from a woman who died between 60,000 and 80,000 years ago in what is now Siberia, has had her DNA sequenced and compared to other Neandertal DNA. From the genetic differences found, researchers think the Neandertals of the area lived in small groups of less than 60 individuals each. She was also more closely related to Neandertal remains found in Croatia than other remains found in Siberia, which suggests that the local population was replaced by populations that migrated into the area at some point.

Also, I have discovered that I’ve been pronouncing Denisovan wrong all this time. I know, shocker that I’d ever mispronounce a word.

Now for a lizard and a couple of corrections and additions to the recent Sirrush episode. Last year, Richard J. and I wrote back and forth about a few things regarding one of my older episodes. Specifically he asked for details about two lizards that I mentioned in episode 21. I promised to get back to him about them and then TOTALLY FORGOT. I found the email exchange while researching this episode and feel really bad now. But then I updated the episode 21 show notes with links to information about both of those lizards so now I feel slightly less guilty.

Richard specifically mentioned that the word sirrush, or rather mush-khush-shu, may mean something like “the splendor serpent.” I totally forgot to mention this in the episode even though it’s awesome and I love it.

One of the lizards Richard asked about was the afa lizard, which I talked about briefly in episode 21. Reportedly the lizard once lived in the marshes near the Tigris and Euphrates rivers in what is now Iraq. Richard wanted to know more about that lizard because he wondered if it might be related to the sirrush legend, which is how we got to talking about the sirrush in the first place and which led to the sirrush episode. Well, Richard followed up with some information he had learned from a coworker who speaks Arabic. Afa apparently just means snake in Arabic, although of course there are different words for snake, and the word has different pronunciations in different dialects. He also mentioned that it’s not just the water monitor lizard that’s known to swim; other monitors do too, including the Nile monitor. I chased down the original article I used to research the afa and found it on Karl Shuker’s blog, and Shuker suggests also that the mysterious afa might be a species of monitor lizard, possibly one unknown to science. We can’t know for certain if the afa influenced the sirrush legend, but it’s neat to think about.

Next up, in cryptid news, Andrew Gable of the excellent Forgotten Darkness podcast suggested that some sightings of the White River Monster, which we talked about in episode 153, might have been an alligator—especially the discovery of tracks and crushed plants on the bank of a small island. This isn’t something I’d thought about or seen suggested anywhere, but it definitely makes sense. I highly recommend the Forgotten Darkness podcast and put a link in the show notes if you want to check it out.

And that leads us to a lake monster to finish up the episode. The Lagarfljót [LAH-gar-flote] worm is a monster from Iceland, which is said to live in the lake that gives it its name. The lake is a pretty big one, 16 miles long, or 25 km, and about a mile and a half wide at its widest, or 2.5 km. It’s 367 feet deep at its deepest spot, or 112 m. It’s fed by a river with the same name and by other rivers filled with runoff from glaciers, and the water is murky because it’s full of silt.

Sightings of the monster go back centuries, with the first sighting generally thought to be from 1345. Iceland kept a sort of yearbook of important events for centuries, which is pretty neat, so we have a lot of information about events from the 14th century on. An entry in the year 1345 talks about the sighting of a strange thing in the water. The thing looked like small islands or humps, but each hump was separated by hundreds of feet, or uh let’s say at least 60 meters. The same event was recorded in later years too.

There’s an old folktale about how the monster came to be, and I’m going to quote directly from an English translation of the story that was collected in 1862 and published in 1866. “A woman living on the banks of the Lagarfljót [River] once gave her daughter a gold ring; the girl would fain see herself in possession of more gold than this one ring, and asked her mother how she could turn the ornament to the best account. The other answered, ‘Put it under a heath-worm.’ This the damsel forthwith did, placing both worm and ring in her linen-basket, and keeping them there some days. But when she looked at the worm next, she found him so wonderfully grown and swollen out, that her basket was beginning to split to pieces. This frightened her so much that, catching up the basket, worm and ring, she flung them all into the river. After a long time this worm waxed wondrous large, and began to kill men and beasts that forded the river. Sometimes he stretched his head up on to the bank, and spouted forth a filthy and deadly poison from his mouth. No one knew how to put a stop to this calamity, until at last two Finns were induced to try to slay the snake. They flung themselves into the water, but soon came forth again, declaring that they had here a mighty fiend to deal with, and that neither could they kill the snake nor get the gold, for under the latter was a second monster twice as hard to vanquish as the first. But they contrived, however, to bind the snake with two fetters, one behind his breast-fin, the other at his tail; therefore the monster has no further power to do harm to man or beast; but it sometimes happens that he stretches his curved body above the water, which is always a sign of some coming distress, hunger, or hard times.”

The heath worm is a type of black slug, not a worm or snake at all, and it certainly won’t grow into a dragon no matter how much gold you give it. But obviously there’s something going on in the lake because there have been strange sightings right up to the present day. There’s even a video taken of what surely does look like a slow-moving serpentine creature just under the water’s surface. There’s a link in the show notes if you want to watch the video.

So let’s talk about the video. It was taken in February of 2012 by a farmer who lives in the area. Unlike a lot of monster videos it really does look like there’s something swimming under the water. It looks like a slow-moving snake with a bulbous head, but it’s not clear how big it is. A researcher in Finland analyzed the video frame by frame and determined that although the serpentine figure under the water looks like it’s moving forward, it’s actually not. The appearance of forward movement is an optical illusion, and the researcher suggested there was a fish net or rope caught under the water and coated with ice, which was being moved by the current.

So in a way I guess a Finn finally slayed the monster after all.

But, of course, the video isn’t the only evidence of something in the lake. If those widely spaced humps in the water aren’t a monstrous lake serpent of some kind, what could they be?

One suggestion is that huge bubbles of methane occasionally rise from the lake’s bottom and get trapped under the surface ice in winter. The methane pushes against the ice until it breaks through, and since methane refracts light differently from ordinary air, it’s possible that it could cause an optical illusion from shore that makes it appear as though humps were rising out of the water. This actually fits with stories about the monster, which is supposed to spew poison and make the ground shake. Iceland is volcanically and geologically highly active, so earthquakes that cause poisonous methane to bubble up from below the lake are not uncommon.

Unfortunately, if something huge did once live in the lake, it would have died by now. In the early 2000s, several rivers in the area were dammed to produce hydroelectricity, and two glacial rivers were diverted to run into the lake. This initially made the lake deeper than it used to be, but has also increased how silty the water is. As a result, not as much light can penetrate deep into the water, which means not as many plants can live in the water, which means not as many small animals can survive by eating the plants, which means larger animals like fish don’t have enough small animals to eat. Therefore the ecosystem in the lake is starting to collapse. Some conservationists warn that the lake will silt up entirely within a century at the rate sand and dirt is being carried into it by the diverted rivers. I think the takeaway from this and episode 179 is that diverting rivers to flow into established lakes is probably not a good idea.

At the moment, though, the lake does look beautiful on the surface, so if you get a chance to visit, definitely go and take lots of pictures. You probably won’t see the Lagarfljót worm, but you never know.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. We also have a Patreon if you’d like to support us that way.

Thanks for listening!

Episode 180: Synchronous Fireflies

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Thanks to Adam for the great suggestion of synchronous fireflies! Let’s learn about lightning bugs (or fireflies) in general, and in particular the famous synchronous fireflies!

Further reading:

How Fireflies Glow and What Signals They’re Sending

Further watching:

Tennessee Fireflies

Synchronizing Fireflies in Thailand (it shows an experiment to encourage the fireflies to start blinking by the use of LEDs)

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week we’re going to learn about a bioluminescent insect, the firefly, also called the lightning bug, but we’ll especially learn about a specific type of various species called synchronous fireflies! This is a suggestion from Adam, so thank you, Adam!

Fireflies are beetles and they’re common throughout much of the world. I actually call them lightning bugs, but firefly is faster to say so I’m going to use that term in this episode. They’re most common in temperate and tropical areas, especially around places with a lot of water and plant cover, like marshes and wooded streams. This is because the firefly spends most of its life as a larva, and it needs to be able to hide from predators and also find the tiny insects, snails and slugs, worms, and other small prey that it eats. Adults of some species don’t eat at all and may not even have mouths, while adults of other species may eat nectar, pollen, or other insects.

There are probably two thousand species of firefly, with more being discovered all the time. While they vary a lot, all of them emit light in one way or another. We’ll talk about how they produce the light in a minute, but first let’s talk about why they light up. In many species, the larvae can light up and do so to let predators know they taste bad. The larvae are usually called glowworms, although that name is also applied to other animals.

Some firefly species don’t light up at all as adults, but many species use their lights to find a mate. Every species has a distinct flash pattern. In some species, the female can’t fly but will sit on the ground or in foliage and watch for her species’ flash pattern from males flying around. When she sees a male she likes, often one whose light is brightest, she signals him by flashing back. Sometimes a pair will flash back and forth for hours, sometimes just minutes, but eventually the male will find the female and they will mate.

As a result, the firefly is sensitive to light pollution, because it needs to see the flashing of potential mates. If there’s too much light from buildings and street lamps, fireflies can’t find each other. They’re also sensitive to many other factors, so if you have a lot of fireflies where you live, you can be proud to live in a healthy ecosystem. But overall, the number of fireflies are in decline all over the world due to habitat loss and pollution of various kinds.

So how does a firefly light up? It’s a chemical reaction that happens in the lower abdomen in a special organ. The organ contains a chemical called luciferin [loo-SIF-er-in] and an enzyme called luciferase [loo-SIF-er-ace], both of which are found in many insects that glow, along with some other chemicals like magnesium. The firefly controls when it flashes by adding oxygen to its light-producing organ, since oxygen reacts with the chemicals to produce light.

Female fireflies in the genus Photinus, which are common in North America and other areas, can’t fly and instead look for potential mates to fly by. When a male sees a female’s answering flash, he lands near her. But sometimes when the male lands, he’s greeted not by a female Photinus but by a female Photuris firefly. Photuris females often mimic the flash patterns of Photinus, and they do so to lure the males close so they can EAT THEM. Photuris is sometimes called the femme fatale firefly as a result. Some species of Photuris will also mimic the flash patterns of other firefly species, so they don’t specifically pick on Photinus. Also, these names are way too similar. Photuris will even grab and eat fireflies that are caught in spiderwebs, stealing from the spider. I like to imagine these femme fatale fireflies with tiny guns and slinky 1950s-era dresses.

But the really interesting thing is that these femme fatale fireflies aren’t just hungry. They belong to species that can’t manufacture the toxic compounds that other fireflies do. After a female Photuris has mated, she needs this compound to protect her eggs when she lays them, so she gets it by eating fireflies that do produce the compound.

Fireflies vary in size, but they’re generally quite small, with the biggest only about an inch long, or 2.5 cm. They’re usually brown or black, sometimes with orange, red, or yellow markings on the head and yellow streaks on the wing covers. They also have a weird smell, which is probably related to this toxic compound. It’s a type of steroid that’s chemically similar to the toxins excreted by some poisonous toads. In one fantastic article I found online, which I link to in the show notes, the writer says, “A colleague of mine once put a firefly in his mouth—and his mouth went numb for an hour!” In other words, don’t eat fireflies even if you’re a frog or a bird.

In many areas, larval fireflies hibernate during the winter, in underground burrows or under tree bark. Once a larva pupates and transforms into an adult, it only lives a matter of weeks. It mates, lays eggs, and dies.

There is an exception, of course. The winter firefly lives in much of North America and actually overwinters as an adult. It lives in tree bark in the winter, coming out in early spring. But the adult winter firefly doesn’t light up. It’s not even nocturnal like most other species. It comes out during the day and the male finds a mate by following the trail of pheromones released by the female. It eats tree sap and is especially attracted to sap buckets when people are tapping maple trees to make maple syrup, which is why it’s also sometimes called the sap bucket beetle. It mates and lays its eggs in spring, then dies. Larvae pupate in late summer so that new adults have several months to build up energy reserves to get them through the winter.

Synchronous fireflies are native to Southeast Asia and the eastern United States, from Georgia to Pennsylvania. There are several famous sites in the United States for synchronous fireflies, including one that’s very close to me, at Elkmont in the Great Smoky Mountains National Park. There are 19 species of firefly in the park, but only one, Photinus carolinus, flashes synchronously. So many people want to see the display that the park has to have a lottery to see who gets tickets. I’ve never been to see the synchronous fireflies, but I have seen synchronous fireflies, at a spot only a five-minute drive from my house.

WHAT?, you may be thinking, if you know anything about synchronous fireflies. There are only like three spots in the United States where these fireflies live! But this actually isn’t the case. In 2015 another species was discovered in East Tennessee, specifically in the Oak Ridge Wildlife Management Area. I remember reading an article about it and contacting the scientist quoted in the article, because I already knew of some synchronous fireflies near my house. No one else seemed to know about them but me.

I looked for the email I got in response, but unfortunately I must have deleted it at some point. This was way before I’d started the podcast so I didn’t think I’d ever need to refer to it. All I remember is that the scientist’s last name was also Shaw and that he said he’s sure there are lots of small pockets of the synchronous fireflies in East Tennessee and surrounding areas, and that they were a different species from the ones in the Smokies, with a different flashing pattern.

And indeed, there are two species of synchronous fireflies in the United States, Photinus carolinus and Photuris frontalis. Photuris is the one I’ve seen. But there’s also a third species of synchronous fireflies in the United States, but it’s only found in Arizona. The species is Photinus knulli, but it’s rare and doesn’t congregate in huge numbers.

The synchronous fireflies found in mangrove forests and other forested areas in southeast Asia are much more common than the species found in the United States, and flash year-round instead of for only a few weeks in summer. I have a couple of links to synchronous fireflies in the show notes, one of them in Tennessee and one in Thailand. The Thailand video is better since you get a better idea of how in synch the fireflies are. In that case, as the video shows, the fireflies were encouraged to start their light show by an experiment with computer-controlled LEDs hidden in a few trees.

So the videos are good, but what do synchronous fireflies really look like when you’re there in person? I mean, it’s easy to say that all the fireflies light up at once and it’s beautiful, but I’ve seen them and this doesn’t even start to explain how amazing it looks. The videos are accurate but let me try to describe my experience.

The ones I’ve seen live in a very small part of the local watershed, on the hillside above a stream called Clear Creek. They only live on one side of the stream, which fortunately is the side where there’s a hiking trail. It’s amazing because you can look across the creek and see just ordinary fireflies flashing, then turn around and see a spectacular lightshow. And even though it’s literally a few minutes’ walk from a little parking lot, I don’t think anyone but me has ever noticed.

They only flash in mid-June when the days are long, so you have to be out late to see them, around 10pm or later. The first time I saw them I was out hiking and went farther than I’d intended, so it was dark when I was approaching the parking lot.

In East Tennessee on a summer evening, it’s dark under the trees but the sky still holds a little light, so that when you look up through the tree canopy you see patches of dark blue. On this particular stretch of trail, it’s dangerous to walk too fast because there are lots of roots and rocks that you can trip over in the dark. So imagine you’re walking along with just enough light from the sky to tell where the trail is. Clear Creek is to your left, broad and shallow here. You can hear it gurgling over rocks. To your right, the ground rises steeply—not too steep to climb if you wanted to, but too steep to bother.

It’s a summer evening, so of course there are fireflies. You don’t pay any attention until you notice something unusual to your right, on the hillside beneath the trees.

That’s funny, three or four fireflies flashed at exactly the same time. But now that your attention is on the hillside, you see another flash as dozens of fireflies light up at the same time. And a few seconds later, when it happens again, you realize that it’s ALL the fireflies on the entire slope—hundreds of them!

At a distance, the flashing looks like a gold-tinted glitter of light, not a glow. Hundreds of tiny glittering lights blink on and then immediately off, so that the entire hillside looks like it’s covered with tiny electric bulbs winking on and off. The flashes come in groups, two or three flashes in a row over the course of several seconds, then a pause, then more flashes. The fireflies on one side of the hill are slightly out of synch with those on the other side of the hill so that the flashing seems to travel in a wave across the hillside. It’s so beautiful you can hardly believe what you’re seeing. It doesn’t even seem real.

One thing I’ve noticed, after being lucky enough to witness this amazing sight several summers in a row, is that the flashing doesn’t fully synchronize until it’s really dark. If I get there too early, I can see the fireflies are trying, but they aren’t quite in time yet. It has to be dark enough for them to really be able to see each other.

So why do some fireflies synchronize their flashing while most don’t? Researchers aren’t sure, but the best guess is that by flashing all together, it’s easier for females to compare males and choose which male they want to mate with. The males may also be trying to keep other males from flashing before they do, which means they eventually all synch up.

It really is an amazing sight. If you’re ever going to be in East Tennessee in June, let me know and I’ll take you out to see my fireflies, or you can sign up to see the really big displays in the Smokies or other areas. Until then, hopefully my description will help you imagine it.

This is what a firefly sounds like. HA, fooled you, they don’t make any noise at all.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or wherever you listen to podcasts. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 179: Lost and Found Animals

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This week let’s learn about some animals that were discovered by science, then not seen again and presumed extinct…until they turned up again, safe and sound!

Further reading:

A nose-horned dragon lizard lost to science for over 100 years has been found

Modigliani’s nose-horned lizard has a nose horn, that’s for sure:

Before the little guy above was rediscovered, we basically just had this painting and an old museum specimen:

The deepwater trout:

The dinosaur ant:

The dinosaur ant statue of Poochera:

The false killer whale bite bite bite bite bite:

Some false killer whales:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week let’s learn about some animals that were discovered by scientists but then lost and assumed extinct, until they were found again many years later. There’s a lot of them and they’re good to think about when we feel down about how many species really are extinct.

We’ll start with a brand new announcement about a reptile called Modigliani’s nose-horned lizard, named after an Italian explorer named Elio Modigliani. He donated a specimen of the lizard to a natural history museum when he got home from exploring Indonesia. That was in 1891, and in 1933 scientists finally described it formally as Harpesaurus modiglianii.

The lizard was especially interesting because it had a horn on its nose that pointed forward and slightly up, and it had spines along its back. It looked like a tiny dragon.

But no one saw another one, not in Indonesia, not anywhere. Researchers knew it had lived where Modigliani said it did because a group of people from Indonesia called the Bataks knew about the lizard. It was part of their mythology and they carved pictures of it. But they didn’t have any, live or dead. Researchers thought it must have gone extinct.

Until 2018. In June 2018, a wildlife biologist named Chairunas Adha Putra was surveying birds in Indonesia, specifically in North Sumatra, when he found a dead lizard. Putra isn’t a lizard expert but he thought it might interest a herpetologist colleague named Thasun Amarasinghe, so he called him. Amarasinghe said oh yeah, that does sound interesting, do you mind sending it to me so I can take a look?

And that’s history, because once he saw it, Amarasinghe knew exactly what the lizard was.

Amarasinghe immediately called Putra, who was still out surveying birds. Could Putra please go back to where he’d found the dead lizard and see if he could find another one, preferably alive? It was really important.

Putra returned obligingly and searched for another lizard. It took him five days, but finally he found one asleep on a branch. He caught it and took pictures, measured it, and observed it before releasing it a few hours later. Hurray for scientists who go that extra mile to help scientists in other fields!

Modigliani’s nose-horned lizard is bright green with a yellow-green belly and spines, plus some mottled orange markings. At least, that’s what it looks like most of the time. It can change colors just like a chameleon. If it’s feeling stressed, it turns a darker gray-green and its spines and belly turn orangey. But it can change its color to match its environment too.

It’s related to a group of lizards called dragon lizards, which includes the bearded dragon that’s often kept as a pet. There are a lot of dragon lizards, and 30 of them have never been seen since they were first described.

Unfortunately, deforestation and habitat loss throughout North Sumatra and other parts of Indonesia threaten many animals, but the Modigliani’s nose-horned lizard was found just outside of a protected area. Hopefully it will stay safely in the protected area while scientists and conservationists study it and work out the best way to keep it safe.

A fish called the deepwater trout, also known as the black kokanee or kunimasu salmon, used to live in a Japanese lake called Lake Tazawa, and that was the only place in the world where it lived. It’s related to the sockeye salmon but it’s much smaller and less flashy. It grows to about a foot long, or 30 cm, and is black and gray in color as an adult, silvery with black markings as a young fish.

In the 1930s, plans to build a hydroelectric power plant on the lake alarmed scientists. The plan was to divert water from the River Tama to work the power station, after which the water would run into the lake. The problem is that the River Tama was acidic with agricultural runoff and water from acidic hot springs in the mountains. The scientists worried that if they didn’t do something to help the fish, soon it would be too late.

In 1935 they moved as many of the fish’s eggs as they could find to other lakes in hopes that the species wouldn’t go extinct. In 1940 the plant was completed, and as expected, the lake’s water became too acidic for the deepwater trout to survive. In fact, it became too acidic for anything to survive. Soon almost everything living in the lake was dead. Within a decade the lake was so acidic that local farmers couldn’t even use it for irrigation, because it just killed any plants it touched. Lake Tazawa is still a mostly dead lake despite several decades of work to lessen its acidity by adding lime to the water.

So, the deepwater trout went extinct in Lake Tazawa along with many other species, and to the scientists’ dismay, they found no sign that the eggs they’d moved to other lakes had survived. The deepwater trout was listed as extinct.

But in 2010, a team of scientists took a closer look at Lake Saiko. It’s one of the lakes where the deepwater trout’s eggs were transferred, and it’s a large, deep lake near Mount Fuji that’s popular with tourists.

The team found nine specimens of deepwater trout. Further study reveals that the population of fish is healthy and numerous enough to survive, as long as it’s left alone. Fortunately, Lake Saiko is inside a national park where the fish can be protected.

Next, let’s look at a species of ant called the dinosaur ant. It was collected by an amateur entomologist named Amy Crocker in 1931 in western Australia. Crocker wasn’t sure what kind of ant she had collected, so she gave the specimens to an entomologist named John Clark. Clark realized the ant was a new species, one that was so different from other ants that he placed it in its own genus.

The dinosaur ant is yellowish in color and workers have a retractable stinger that can inflict painful stings. It has large black eyes that help it navigate at night, since workers are nocturnal. It lives in old-growth woodlands in only a few places in Australia, as far as researchers can tell, and it prefers cool weather. Its colonies are very small, usually less than a hundred ants per nest. Queen ants have vestigial wings while males have fully developed wings, and instead of a nuptial flight that we talked about in episode 175 last month, young queens leave the nest where they’re hatched by just walking away from it instead of flying. Males fly away, and researchers think that once the queens have traveled a certain distance from their birth colony, they release pheromones that attract males. If a queen with an established colony dies, she may be replaced with one of her daughters or the colony may adopt a young queen from outside the colony. Sometimes a queen will go out foraging for her food, instead of being restricted to the nest and fed by workers, as in other ant species.

The dinosaur ant is called that because many of its features are extremely primitive compared to other ants. It most closely resembles the ant genus Prionomyrmex, which went extinct around 29 million years ago. Once researchers realized just how unusual the dinosaur ant was, and how important it might be to our understanding of how ants evolved, they went to collect more specimens to study. But…they couldn’t find any.

For 46 years, entomologists combed western Australia searching for the dinosaur ant, and everyone worried it had gone extinct. It wasn’t until 1977 that a team found it—and not where they expected it to be. Instead of western Australia, the team was searching in South Australia. They found the ant near a tiny town called Poochera, population 34 as of 2019, and the town is now famous among ant enthusiasts who travel there to study the dinosaur ant. There’s a statue of an ant in the town and everything.

The dinosaur ant is now considered to be the most well-studied ant in the world. It’s also still considered critically endangered due to habitat loss and climate change, but it’s easy to keep in captivity and many entomologists do.

Let’s finish with a mammal, and the situation here is a little different. In 1846 a British paleontologist published a book about British fossils, and one of the entries was a description of a dolphin. The description was based on a partially fossilized skull discovered three years before and dated to 126,000 years ago. It was referred to as the false killer whale because its skull resembled that of a modern orca. Scientists thought it was the ancestor of the orca and that it was extinct.

Uh, well, maybe not, because in 1861, a dead but very recently alive one washed up on the coast of Denmark.

The false killer whale is dark gray and grows up to 20 feet long, or 6 meters. It navigates and finds prey using echolocation and mostly eats squid and fish, including sharks. It’s not that closely related to the orca and actually looks more like a pilot whale. It lives in warm and tropical oceans and some research suggests it may migrate to different feeding spots throughout the year. It often travels in large groups of a hundred individuals. That’s as many dolphins as there are ants in dinosaur ant colonies. Part of the year it spends in shallow water, the rest of the year in deeper water, only coming closer to shore to feed.

Researchers are only just starting to learn more than the basics about the false killer whale, and what they’re learning is surprising. It will share food with its family and friends, and will sometimes offer fish to people who are in the water. It sometimes forms mixed-species groups with other species of dolphin, sometimes hybridizes with other closely-related species of dolphin, and will protect other species of dolphin from predators. It’s especially friendly with the bottlenose dolphin. So basically, this is a pretty nice animal to have around if you’re a dolphin, or if you’re a swimming human who would like a free fish. So it’s a good thing that it didn’t go extinct 126,000 years ago.

This is what the false killer whale sounds like:

[false killer whale sounds]

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or wherever you listen to podcasts. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 175: Three Small Mystery Animals

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This week we’ve got three more mystery animals, but they’re small instead of gigantic! Also, I didn’t say anything about it in the episode, but Black lives matter. Stay safe and fight for justice, everyone.

The water chevrotain:

The real-life face-scratcher monster, Schizodactylus monstrosus, more properly known as a dune cricket:

Flying ants:

It’s flying ants, that’s what it is:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week we’re going to learn about three mystery animals, but they’re not giants. They’re small mysteries.

We’ll start with a small mystery animal from the Republic of Guinea in West Africa. Guinea borders the ocean on its west and is shaped sort of like a croissant. The middle of the country is mountainous, which is where the tankongh is supposedly found.

The tankongh is supposed to look like a small, shy zebra with tusks and it lives in high mountain forests. If that description makes you think of a chevrotain, you may have listened to episode 116, about various unusual hoofed animals. The chevrotain is a small ruminant that has short tusks or fangs instead of horns or antlers like other ruminants. Many have white stripes and spots, including the water chevrotain.

The water chevrotain is the largest of the known chevrotain species, but that’s not saying much because they’re all pretty small. The female is a little larger than the male, but it’s barely more than a foot tall at the shoulder, or 35 cm. The coat is reddish-brown with horizontal white stripes on the sides and white spots on the back. It has a rounded rump with a short tail that’s white underneath. So, you know, it’s sort of rabbit-like, but with long slender legs and tiny cloven hooves like a little bitty pig’s legs. It lives in tropical lowland forests of Africa, always near water. It’s nocturnal and mostly eats fruit, although it will also eat insects and crabs.

But while that sounds a little like the description given of the tankongh, it’s not a very close match. The water chevrotain only lives in lowlands, while the tankongh is supposed to live in the mountains. But the water chevrotain is the only species of chevrotain that lives in Africa; all the others are native to Asia.

So it’s very possible that there’s another chevrotain species hiding in the mountains of Guinea and nearby countries. One visitor to Guinea reported being shown some tiny gray hooves and pieces of black and cream skin supposedly from a tankongh that had been killed and eaten. Since the water chevrotain is red-brown and white, the skin must be from a different animal. Unfortunately, the witness doesn’t report if the hooves were cloven like the chevrotain’s.

Hopefully, if this is a species of chevrotain that’s new to science, it’s safe in its mountain habitat from the deforestation, mining, and other issues threatening many animals in Guinea.

Our next mystery animal is an invertebrate from India called the muhnochwa, or face scratcher. The story apparently started in 2002 and spread throughout Uttar Pradesh state. Stories of a small but hideous insect with six legs covered with spines caused panic during an especially hot, dry summer. The scratch monster supposedly came out at night and attacked sleepers, scratching them greviously with its legs, sometimes causing burns or even killing people. Some witnesses said it was the size of a football and that it glowed or sparkled with red and blue lights.

Then, in late August, someone trapped a scratch monster and took it to Lucknow University for identification. It was a type of dune cricket, usually only found in sandy ground near river banks in parts of India, Pakistan, Sri Lanka, and Myanmar. It grows around three inches long, or almost 8 cm, and is yellowish-brown with sturdy legs that do indeed have spiny structures at the ends. It’s nocturnal although it doesn’t glow or shine.

During the day, the dune cricket lives in burrows it digs in the sandy soil, often very deep burrows since the cricket prefers damp ground. It comes out at night to hunt insects, especially grasshoppers, beetles, and crickets, including other dune crickets. Its antennae are longer than its body and the spines on its legs help it burrow and navigate the sandy soil where it lives.

So while the cricket is scary-looking, it’s not dangerous to humans at all. It certainly couldn’t kill anyone, and probably couldn’t do more than make faint scratches that wouldn’t even pierce the skin.

Possibly what happened was that unusually dry weather caused the crickets to search for moist ground, which means they might have been seen in areas where they were usually extremely rare. Because of its ferocious appearance, people assumed it was dangerous, and then stories about people dying from the insect started circulating, which made people even more frightened. Even after the insect was identified, news outlets kept reporting it as a monstrous, possibly extraterrestrial creature, which made things worse, although fortunately it eventually turned into an urban legend sort of joke once people realized it wasn’t really dangerous.

Oh, and the dune cricket is also an insect in Animal Crossing, called the mole cricket. You have to listen for its chirping, then dig it up, and quick switch to your net to scoop it up as it runs away. But you can’t do that now unless you live in the southern hemisphere, because it’s only in the game between November and May in the northern hemisphere.

Our last small mystery animal is an ant, but not one particular species of ant. In many ant species, once a year a special hatch of eggs develop into ants with wings. The female ants are all queens but there are also plenty of much smaller males. The ants swarm into the air and fly off in a group. This generally happens in summer, especially on hot, humid days.

It’s known as a nuptial swarm because all the ants are ready to mate and start new colonies. Well, the queens start new colonies. The males just die. The queen ants that survive the nuptial swarm after mating land, bite off their own wings, and search for a good place to start a new nest. If the queen survives, she begins laying eggs to hatch workers, using the sperm she collected from males during the flight. She’ll use the sperm for the rest of her life, and in some species that’s something like twenty years. She stores it in a special chamber in her body.

Entomologists know a lot about swarming ants. It’s not exactly a rare phenomenon. Nuptial swarms can sometimes contain millions of individual ants as ants from different colonies combine. This helps reduce the risk of any particular ant being eaten by predators and it helps mix up the gene pool by allowing ants from different colonies to find each other and mate. The females release pheromones that attract the males, and the females usually fly quickly and make the male pursue so queens mate with only the strongest males.

Different species of ant will fly at different times and require different temperature and humidity levels to start the nuptial flight. Many species prefer to fly after rain or thunderstorms and some prefer to fly in late evening or at night when there are fewer predators. Sometimes a swarm is so large it shows up on weather radar.

But that’s not the mysterious part. But is it possible that these clouds of winged ants, which often fly so closely together that they seem to be a solid mass, could be the source of some UFO sightings?

At first thought that’s preposterous. Ants don’t give off light any more than dune crickets do. Or do they?

Ants have hard exoskeletons and sometimes this can reflect sunlight so that the ant appears to glow. But I’m talking about actual glowing ants, not just reflected light.

As you may remember from episode 10, about electric animals, we’re only just now starting to learn about how insects and other invertebrates use electric fields. One thing that we know happens is a build-up of static electricity on the body of flying insects. This is well documented in bumblebees and when a bee lands on a flower, the static electricity actually temporarily changes the flower’s own negative charge. Other bees can sense this change and know that a bee has already visited that flower recently. The static charge also helps pollen adhere to the bee.

So it’s completely possible that flying ants also have an electrostatic charge, from both the action of the wings and the movement of air molecules over the body. Ordinarily that wouldn’t be visible, but in late evening or night-time when the air is already charged from the recent passage of a storm, on rare occasions the whole colony might glow. Since it’s hard enough to tell an object’s size, distance, and speed in the air, a zigzagging, fast-moving, densely compacted swarm of a million or so winged ants glowing in the sky might be taken for a much larger but much farther away aircraft of some kind emitting light.

That’s not to say that every UFO is a swarm of glowing winged ants. Obviously, even if it does happen like this, it would be extremely rare. But it might be the case for the occasional UFO sighting. After all, UFOs are unidentified flying objects, whether that object is an alien spaceship buzzing our planet or a bunch of glowing ants. So if you see a UFO on a humid summer night after a thunderstorm, maybe take a closer look just in case you’re observing an incredibly rare natural phenomenon. And if it isn’t glowing ants, it might be aliens, so either way you might see something amazing.

You can find Strange Animals Podcast online at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, or suggestions for future episodes, email us at strangeanimalspodcast@gmail.com. If you like the podcast and want to help us out, leave a rating and review on Apple Podcasts or wherever you listen to podcasts. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

 

Episode 174: MONSTER CEPHALOPODS!

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It’s a bonus monster month in June, because everything is awful and learning about monsters will take our minds off the awfulness. This week let’s learn about some mysterious stories from around the world that feature huge octopus or squid!

Further watching:

River Monsters episode about the Lusca

A colossal squid, up close to that gigantic eyeball:

Blue holes in the ocean and on land:

A giant Pacific octopus swimming:

The popular image of the kraken since the 1750s:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

Last week’s mystery bird got me thinking about how far away Halloween feels and how we haven’t really had a lot of monsters or mystery animals lately. So let’s have an extra monster month in June! We’ll start with a topic I’ve touched on in past episodes but haven’t covered in depth, three stories of GIANT OCTOPUS TYPE MONSTERS from around the world.

If you haven’t listened to episode 142, about octopuses, that ran last October, I recommend you listen to it for information about octopus biology and habits. This week we are all about the mysterious and gigantic octopuses.

Let’s jump right in with a monster from Japan, Akkorokamui. Its origins trace back to the folklore of the Ainu, a group of people who in the past mostly lived on Hokkaido, the second largest island in the country. These days they live throughout Japan. The story goes that a monster lives off the coast of Hokkaido, an octopus-like animal that in some stories is said to be 400 feet long, or over 120 meters. It’s supposed to swallow boats and whales whole. But Akkorokamui isn’t just an octopus. It has human features as well and godlike powers of healing. It’s also red, and because it’s so big, when it rises near the surface of the water, the water and even the sky look red too.

Akkorokamui is supposed to originally be from the land. A humongous red spider lived in the mountains, but one day it came down from the mountains and attacked a town, stomping down buildings as the earth shook. The villagers prayed for help, and the god of the sea heard them. He pulled the giant spider into the water where it turned into a giant octopus.

The problem with folktales, as we talked about way back in episode 17, about the Thunderbird, is that they’re not usually meant to be taken at face value. Stories impart many different kinds of information, especially in societies where writing isn’t known or isn’t known by everyone. Folktales can give warnings, record historical events, and entertain listeners, all at once. It’s possible the story of Akkorokamui is this kind of story, possibly one imparting historic information about an earthquake or tsunami that brought down a mountain and destroyed a town. That’s just a guess, though, since I don’t understand Japanese—and even if I did, the Ainu people were historically treated as inferior by the Japanese since their ancestors came from other parts of Asia, so many of their stories were never recorded properly. The Ainu people today have lost some of their historic cultural memories as they assimilated into Japanese society.

So we don’t know if Akkorokamui was once thought of as a real living animal, a spiritual entity, or just a story. There are a few reported sightings of the monster, but they’re all old and light on details. One account from the 19th century is supposedly from a Japanese fisherman who saw a monster with tentacles as big around as a grown man. It was so big that the fisherman at first thought he was just seeing reflected sunset light on the ocean. Then he came closer and realized what he was looking at—and that it was looking back at him from one enormous eye. He estimated it was something like 260 feet long, or 80 meters. Fortunately, instead of swallowing his boat, the monster sank back into the ocean.

Whether or not the folktale Akkorokamui was ever considered to be a real animal, it’s possible that some people who have seen enormous octopuses or squids have called them Akkorokamui. If you’ve listened to episode 74 about the colossal and giant squids, you may remember that both can grow over 40 feet long, or 12 meters, although the giant squid has longer arms while the colossal squid has a longer mantle in proportion to its arms. The two feeding tentacles that squids have are even longer than its arms when extended, which increases the longest measured length to 55 feet, or almost 17 meters. Both squid species are deep-sea animals that are rarely seen near the surface. But both are usually pink or red in color. A squid that big would terrify anyone, especially if they’re fishing in a small boat.

Another octopus-like sea monster is the lusca, this one from Caribbean folklore. The Caribbean Sea is part of the Atlantic Ocean outside of the Gulf of Mexico. Within the Caribbean Sea are thousands of islands, some tiny, some large, including those known collectively as the West Indies. Many reports of the lusca come from the Bahamas, specifically the so-called blue holes that dot many of the islands.

Blue holes are big round sinkholes that connect to the ocean through underground passages. Usually blue holes contain seawater, but some may have a layer of fresh water on top. Some blue holes are underwater while some are on land. The islands of the Bahamas aren’t the only places where blue holes exist. Australia, China, and Egypt all have famous blue holes, for instance, but they’re not uncommon across the world.

Blue holes form in land that contains a lot of limestone. Limestone weathers more easily than other types of rock, and most caves are formed by water percolating through limestone and slowly wearing passages through it. This is how blue holes formed too. During the Pleistocene, when the oceans were substantially lower since so much water was locked up in glaciers, blue holes formed on land, and many of them were later submerged when the sea levels rose. They can be large at the surface, but divers who try to descend into a blue hole soon discover that it pinches closed and turns into twisty passages that eventually reach the ocean, although no diver has been able to navigate so far. Many, many divers have died exploring blue holes.

Andros Island in the Bahamas has 178 blue holes on land and more than 50 in the ocean surrounding the island. It’s also the source of a lot of lusca reports.

So what does the lusca look like? Reports describe a monster that’s sharklike in the front with long octopus-like legs. It’s supposed to be huge, with an armspan of 75 feet, or 23 meters, or even more. The story goes that the tides that rise and fall in the blue holes aren’t due to tides at all but to the lusca breathing in and out.

But people really do occasionally see what they think is a lusca, and sometimes people swimming in a blue hole are dragged under and never seen again. Since blue holes don’t contain currents, it must be an animal living in the water that occasionally grabs a swimmer.

The problem is, there’s very little oxygen in the water deep within a blue hole. Fish and other animals live near the surface, but only bacteria that can thrive in low-oxygen environments live deeper. So even though the blue holes are connected to the ocean, it’s not a passage that most animals could survive. Larger animals wouldn’t be able to squeeze through the narrow openings in the rock anyway.

But maybe they don’t need to. Most blue holes have side passages carved out by freshwater streams flowing into the marine water, which causes a chemical reaction that speeds the dissolving of limestone. Some blue holes on Andros Island have side passages that extend a couple of miles, or several kilometers. It’s possible that some of these side passages also connect to the ocean, and some of them may connect to other blue holes. Most of the blue holes and side passages aren’t mapped since it’s so hard to get equipment through them.

But as far as we know, there is no monster that looks like a shark with octopus-like legs. That has to be a story to scare people, right? Maybe not. The largest octopus known to science is the giant Pacific octopus, which we talked about in episode 142. The largest ever measured had an armspan of 32 feet, or almost 10 meters. It lives in deep water and like all octopuses, it can squeeze its boneless body through quite small openings. When it swims, its arms trail behind it something like a squid’s, and it moves headfirst through the water. A big octopus has a big mantle with openings on both sides for the gills and an aperture above the siphon. The mantle of the octopus could easily be mistaken for the nose of a shark, with a glimpse of the openings assumed to be its partially open mouth. And a large octopus could easily grab a human swimming in a blue hole and drag it to its side passage lair to eat. Big octopuses eat sharks.

The giant Pacific octopus lives in the Pacific, though, not the Atlantic. If the lusca is a huge octopus, it’s probably a species unknown to science, possibly one whose mantle is more pointy in shape, more like a squid’s. That would make it resemble a shark’s snout even more.

Finally, let’s look at a monster many of us are already familiar with, the kraken. Many people think the legend of the kraken was just an exaggerated description of the giant squid. But that’s actually not the case.

The kraken is a Scandinavian monster that dates back to at least the 13th century, when a Norwegian historian wrote about it. That historian, whose name we don’t know, said it was so big that sailors took it for land while it was basking at the surface. The sailors would stop to make camp on what they thought was an island, but when they lit a campfire the kraken submerged and drowned the sailors. It could swallow ships and whales whole.

Nothing about the story mentions squid-like arms until the 1750s when a bishop called Erik Pontoppidan wrote about the kraken. Pontoppidan repeated the story of the kraken appearing island-like and then submerging, but said that it wasn’t the submerging that was so dangerous, it was the whirlpool the kraken caused as it submerged. I’d say that’s just a little bit of hair-splitting, because those sailors were in trouble either way. But Pontoppidan also said that the kraken could pull ships down into the ocean with its arms, which immediately made people think of squid and octopuses of enormous size. The idea of a stupendously large squid or octopus with its arms wrapped around a ship made its way into popular culture and remains there today.

The kraken story was probably inspired by whales, which of course were well known to Scandinavian sailors and fishers. It also might have been inspired by remote islands that are so low in the water that they’re sometimes submerged.

All that aside, could a cephalopod of enormous size actually reach out of deep water and grab the railing or masts of a ship or boat? Actually, it can’t do that, no matter how big or small. Remember that cephalopods have no skeleton, and while their arms are remarkably strong, it takes a whole lot of energy to lift a body part out of the water. We don’t notice this when swimming because our bodies are naturally buoyant especially with our lungs filled with air, and we have bones to give our bodies structure. An octopus spends most of its life supported by the water. When it comes out of the water, it stays very flat to the ground. It can only lift an arm out of the water if it can brace itself against something.

So the dramatic movie scenes where massive kraken arms suddenly shoot out of the water to seize a ship are just fantasy. But an octopus could grab onto the side of a ship with its suction cups and even heave itself onboard that way, potentially capsizing it. So that’s something fun to think about the next time you’re in a boat.

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