Category Archives: North America

Episode 161: Strange Bird Sounds 2

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I still have a cold, so let’s let some birds do part of the talking in this episode about more weird bird calls!

Further reading:

Listen to the Loudest Bird Ever Recorded

Further listening/watching:

A video of the screaming piha. You need to see this.

The yellow-bellied sapsucker is a real bird, and an adorable one too:

The mute swan is not actually mute:

The white bellbird is the loudest bird ever recorded (photo by Anselmo d’Affonseca):

The screaming piha is hilariously loud. Left, sitting like a normal bird. Right, screaming:

Show transcript:

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

I still have this rotten cold, although I’m getting over it. As you can hear, my voice is pretty messed up, so for this episode I’ll let birds do some of the talking for me. Yes, it’s another weird bird calls episode!

We’ll start with this cute little call:

[yellow-bellied sapsucker call]

That’s not a dog’s squeaky toy, it’s a yellow-bellied sapsucker. Yes, that’s a real bird. It’s a type of woodpecker that lives in much of eastern and northern North America, breeding in Canada and spending winters in the eastern United States and Mexico. I get them in my yard sometimes. The sapsucker will also drum on dead trees and other items to make a loud sound to communicate with other sapsuckers.

It mostly eats tree sap, but it also eats berries, small insects, and fruit. To get the tree sap, it drills small holes in tree bark, usually in neat rows, and licks up the sap that oozes from the holes. If you ever see a tree with rows of little holes in the bark, that was done by a sapsucker. It can sometimes even kill trees this way, but for the most part it doesn’t hurt the tree unless the tree is already dying.

Males and females both forage for insects to feed their babies. They usually dip the insects in tree sap before feeding them to the chicks. Yummy!

Next up is this little grunty call:

[mute swan call]

Maybe it’s not exciting or loud, but it’s made by a bird you wouldn’t expect to hear, the mute swan. I mean, the word mute is right there in its name but it’s not mute at all. The mute swan is a big white waterfowl from Eurasia, although it’s been introduced to other parts of the world since it’s so pretty. Its legs are black with an orange and black bill, and it has a long neck that it uses to reach plants that are deeper underwater than ducks and most geese can get at. Its wingspan can be seven and a half feet across, or 2.4 meters. It’s more closely related to the black swan of Australia and the black-necked swan of South America than it is to other swan species from Eurasia.

Mute swans get their name not because they can’t make sounds, obviously, but because they’re not as noisy as other swan species. Not only does it make the little grunting sounds we just heard, it will sometimes hiss aggressively if a person or animal gets too close to its nest. Also, swans can give you such a wallop with their wings that they could knock you out stone cold, so it’s best to just watch them from a distance and not get too close. When mute swans fly, their wings make a distinctive thrumming sound that helps them stay in contact with other mute swans. This is what their wingbeats sound like:

[mute swans flying]

That sounds more like a UFO than a bird, just saying.

Next is a weird metallic call that doesn’t sound like a noise a bird could make either. It sounds like an industrial machine of some kind:

[white bellbird call]

That’s the sound the male white bellbird gives to attract a female. It also happens to be the loudest bird call ever recorded. In late 2018, an ornithologist from Brazil teamed up with a bioacoustician from the United States. They traveled into the mountainous forests of the Brazilian Amazon to record both the white bellbird and our next bird, which I’ll get to in a minute.

The male white bellbird is white with a black bill with a long wattle hanging from it. The female is green streaked with brown. It’s about the size of a pigeon but the male is as loud as a piledriver hammering rock. The male sits on an exposed perch to call, usually the top of a tree. If a female is interested, she’ll join him. The male will turn his back on the female, then turn around quickly to face her during the call, which adds an extra level of drama to an already dramatic call. These birds are the rock stars of the bird world.

The white bellbird eats fruit, some of it rather large, so the bird can open its beak really wide. This makes its beak act as the bell of an instrument like a trumpet, which helps increase the volume of its call. It also has a robust syrinx and unusually strong abdominal muscles. Its call can reach 125 decibels, which is louder than a firetruck’s siren, a rock band, and even a thunderclap.

Let’s finish with another extremely loud bird:

[screaming piha call]

That’s the male screaming piha, which is related to the white bellbird and lives in the same areas in South America. It’s a drab-looking bird, plain grayish in color, and it looks like a type of thrush. It’s a little bit bigger than an American robin. But drab as it is, keep in mind the bird has “screaming” right in its name. It’s almost as loud as the white bellbird.

The screaming piha eats fruit and insects, and it especially likes figs, which it often swallows whole. I like figs too but I chew them. Also, I don’t scream to attract a mate. The male usually perches in a tree and starts with a couple of relatively ordinary-sounding notes. But when he does the actual screaming part, he tips backwards on his perch, pulls his head back into his shoulders, so to speak, opens his beak wide to show how orange it is inside, and SCREAMS. It’s hilarious to watch. I’ve linked to a video in the show notes and you really do owe it to yourself to give it a watch.

The male gives these calls to attract a female, but it’s also useful to define his territory to other males. During mating season the males gather in a group called a lek to show off for females, and then pairs return to the male’s territory to build a nest. We don’t know a whole lot about the bird’s nesting behavior, but they appear to only lay one egg. Fortunately the screaming piha is a common bird that’s doing well, because if you’ve watched that video of one screaming you’ll agree that it’s probably the funniest bird ever and we definitely need them in the world.

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 158: Legless Lizards and Other Not-Snakes

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What’s the difference between a snake and a legless lizard? Find out this week and learn about all kinds of interesting reptiles without legs that aren’t actually snakes!

The slow-worm. Not a snake:

Burton’s legless lizard. Not a snake:

The excitable delma. Not a snake:

The Mexican mole lizard. Not a snake or a worm:

The red worm lizard (Amphisbaena alba). Also not a snake or a worm, but honestly, it looks a lot like I imagine the Mongolian death worm to look:

The giant legless skink. Not a snake:

Stacy’s bachia. Not a snake:

Further reading (and this is where I got the Stacy’s bachia picture above):

Bachia lizards–look, no hands!

An Explosive Enigma from Kalmykia—the ‘Other’ Mongolian Death Worm?

Show transcript:

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

A couple of weeks ago we discussed the Mongolian death worm and the possibility that it was an animal called an amphisbaenian, which is a reptile without legs that’s not a snake. But there are lots of other legless reptiles that aren’t snakes. So this week we’re going to learn about legless lizards and their friends.

Researchers have determined that leglessness evolved in reptiles many different times in species that aren’t related, often in species that spend at least part of their time underground. If the legs get in the way of burrowing or other movement, over time individuals born without legs or with much smaller legs end up finding more food than those with legs. That means they’re more likely to reproduce, and their offspring may inherit the trait of no legs or smaller legs.

Some legless lizards look so much like snakes at first glance that it can be hard to tell them apart. The common slow-worm, for instance, lives throughout most of Europe and part of Asia. It grows to about a foot and a half long, or 50 cm, and is brown. It mostly eats slugs and worms so it spends most of its time in damp places or underground. But while it looks superficially like a snake, it’s not a snake. It’s a lizard with no legs. Like some other lizard species, including many legless lizards, it can even drop its tail if it’s threatened and then regrows a little tail stump.

So how can you tell the difference between a legless lizard and a snake? The one big clue is if the reptile blinks. Snakes don’t have eyelids; instead, their eyes are protected by a transparent scale that covers the eye completely. Lizards have eyelids and blink. Legless lizards have a different head shape from snakes too, usually more blocky and less flattened. The tongue is not so much forked as just notched, and shorter and less slender than a snake’s tongue.

Species of one family of legless lizards do sometimes have legs. Honestly, this is almost as confusing as the whole deer and antelope mix-up from episode 116. The family is Pygopodidae and they’re actually most closely related to geckos although they don’t look much like geckos. They look like snakes, and to make things even more complicated, geckos and Pygopodids don’t have eyelids. I know I know, I just said lizards have eyelids but geckos are an exception. Pygopodids don’t have front legs at all, but some do have vestigial hind legs that look more like little flaps than actual legs. They’re sometimes called flap-footed lizards as a result. They live in Australia and New Guinea.

One Pygopodid is Burton’s legless lizard, which does actually have vestigial hind legs. It lives in parts of Australia and Papua New Guinea and is kind of a chunky reptile with a pointed nose. It’s brown or gray, sometimes with long stripes, and can grow to more than three feet long, or one meter. It eats other lizards, especially skinks, but will also sometimes eat small snakes.

Burton’s legless lizard mostly stays in leaf litter in forests. Sometimes it will twitch the end of its tail to attract a lizard, which it then grabs by the neck. It will swallow small lizards whole, but if it’s too big to swallow, it will just hold onto its neck until the lizard suffocates or just gives up out of exhaustion. It can also retract its eyes so they’re less likely to be injured if its prey fights back.

The excitable delma is another pygopodid, this one without any legs at all. It lives in many parts of Australia and can grow nearly two feet long, or 54 cm, but almost half that length is tail. It’s shy and nocturnal, so even though it’s very common, it’s seldom seen. It’s brown or grayish with darker stripes on its head. The reason it’s called the excitable delma is because it uses its long tail to jump, twisting and changing directions as it jumps repeatedly up to six inches off the ground, or 15 cm. It does this to escape from predators but it also sometimes just jumps around for the heck of it, according to observations of excitable delmas in captivity. It can also make a squeaky sound. It likes dry, rocky areas and eats insects.

There are other reptiles that look like snakes but aren’t, in addition to the legless lizards. We talked about the amphisbaenians in the Mongolian animals episode a few weeks ago, and also in episode 10. Amphisbaenians are sometimes called worm lizards because they look less like snakes than they do worms. They’re related to both legless lizards and snakes but lost their legs independently.

The amphisbaenian moves like a worm, not a snake. Its skin is loosely attached to its body so that it can move freely, and it bunches up its skin the way a worm bunches up its body, then extends it to move forward or backward. This kind of action is called peristalsis, by the way. Unlike worms, the amphisbaenian has scales because it’s a reptile, but the scales are often arranged in rings that make it look even more like an earthworm. Many amphisbaenians are pink like many earthworms, too.

Most amphisbaenians live underground their entire lives, hunting worms, insect grubs, and other small animals. In most cases they only come to the surface at night or after a heavy rain. Most have no legs at all, but one family consisting of four species, all of them native to Mexico, has little front legs. One of these species is the Mexican mole lizard, which can grow over a foot long, or more than 30 cm. It mostly eats soft-bodied animals like worms and termites, but it will occasionally eat small lizards. It’s pink and has little black dots for eyes and is actually really cute, but don’t let that fool you. If you are a worm, the Mexican mole lizard is a murder machine. It has sharp little teeth that it uses to bite pieces from its prey instead of swallowing them whole.

All the other known amphisbaenians have no legs at all, and for most species we know very little about them. The red worm lizard, for instance, lives throughout much of western South America and appears to be common, but it lives underground and is hardly ever seen. It’s the largest amphisbaenian known and can grow nearly three feet long, or 85 cm, although it’s only a few inches thick, or around 6 cm. It’s brown, reddish, or yellowish in color with a white belly and has tiny eyes that are barely visible. Its tail is blunt and rounded like other amphisbaenian tails, but its tail is tough enough to withstand bites from predators without being injured. If the red worm lizard feels threatened, it raises its head and tail and bends itself into a U shape so that it looks like it has two heads.

That’s why the amphisbaenian has that name, by the way. In ancient mythology, the amphisbaena was a serpent with a head on each end of its body. It was said to mostly eat ants, and that’s actually a good observation of the real amphisbaenian, which often eats ants, termites, and other insects.

Legless skinks are another group of lizards that either have no legs at all or just little flaps instead of hind legs. The males are the ones with the hind leg flaps, which they use to hold onto the female while mating. Most legless skinks look sort of like amphisbaenians, with a blunt-ended tail that’s sometimes hard to tell from the head, but more snakey than wormy for the most part.

One example is the giant legless skink, which is dark gray or black with no legs, and which lives in South Africa. It grows almost a foot and a half long, or 42 cm, and is a little bit of a chonk. We still don’t know much about it but it probably eats insects and other invertebrates like most legless skinks do.

A while back, Llewelly sent me a link to an article about Stacy’s bachia, a lizard that lives in the tropics of South America. It’s a member of the spectacled lizards, which all have lower eyelids that are transparent. That way the lizard can see even if its eyes are closed. I put a link to the article in the show notes if you want to read it.

Stacy’s bachia usually has no hind legs, although it may have little stubby ones, but it hatches with small front legs. But it spends most of its life burrowing in soil and in leaf litter as it hunts termites, ants, and other small animals, and eventually all its legs wear away to nothing.

Let’s finish with a mystery animal. Kalmykia is a small region of Russia, and the native people of the area are called Kalmyks. The Kalmyks report that there’s an animal that lives in both the steppes and in sand dunes in the desert that looks like a snake but isn’t a snake, which they actually call the short gray snake. It grows around 20 inches long, or 50 cm, and has smooth skin and a tail that’s short and rounded at the end. It has no legs. This report is from zoologist Karl Shuker’s blog, and check the show notes for a link. The person who told him about this animal also says it’s about six to eight inches thick, or up to 20 cm, so if that’s correct it’s even more of a chonk than the giant legless skink.

Kalmykia is west of Kazakhstan, which is west of Mongolia, so there’s always the possibility that this legless animal is related to or the same animal as the Mongolian death worm that we talked about in episode 156. But Kalmykia is actually pretty far away from Mongolia, and the short gray snake is different from the death worm in two important ways. One, reports say it has no bones. If this is true, it must be some kind of invertebrate, not a reptile. It’s also supposed to move like a worm, although remember that the amphisbaenian does too and it’s a reptile.

But the other thing reported about the short gray snake is much weirder than having no bones. Apparently if someone hits the animal in a particular place on its back—presumably with a stick—it EXPLODES. It explodes into goo that spreads for several feet in every direction, or about a meter, leaving nothing else behind.

It’s possible this isn’t a real animal but a folktale, something like American tall tales about the hoop snake that’s supposed to grab its tail in its mouth and roll itself along like a hoop. The hoop snake is not a real animal, in case you were wondering. There’s no way of telling whether the exploding boneless short gray snake is a real animal, a folktale, or reports of more than one real animal that have gotten mixed up in translation. Hopefully someone who lives in Kalmykia will investigate and find out more. In the meantime, don’t hit any animals with sticks. For one thing, that’s mean. For another, it might explode and leave you covered in goo.

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 at patreon.com/strangeanimalspodcast if you’d like to support us and get twice-monthly bonus episodes.

Thanks for listening!

Episode 153: The White River Monster

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Let’s start out the new year with a bona fide mystery animal, the White River Monster from Arkansas! Is it a real animal? If so, is it a known animal or something new to science? If it’s a known animal, what could it be? Lots of questions, maybe a few answers! Happy new year!

Further listening:

MonsterTalk

The not exactly useful picture supposedly of the White River Monster, taken in 1971:

A northern elephant seal, AKA Mr. Blobby:

A Florida manatee:

A bull shark:

Two bottlenose dolphins:

An alligator gar (below) and a human (above):

Alligator gar WEIRD FISH FACE:

Gulf sturgeon:

Show transcript:

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

If you’ve listened to the final episode of 2019 last week, you’ll remember it was about some mystery water animals of various kinds. Well, I’ve got another water mystery for you today to start off the new year, the White River monster. I heard about this one in a recent episode of MonsterTalk, which is a great podcast I recommend if you don’t already listen to it.

The White River is in North America, originating in the mountains in northwestern Arkansas and flowing from there through Missouri, then back into Arkansas where it joins the Mississippi River. In 1915 a man near the small town of Newport, in the central Ozarks region of Arkansas, saw an enormous animal with gray skin in the river.

A few other people saw it too, but it wasn’t until July of 1937 that things really heated up. The monster returned, and this time a lot of people saw it. News of it hit the local papers and spread throughout the country, and people started showing up to look for it. Some people came prepared to kill or catch it while others just wanted to see it.

Estimates of the monster’s size varied quite a bit. A man named Bramlett Bateman, who owned a lot of the farmland along that stretch of the river, was quoted in several newspaper articles. He described the monster as being the length of three cars in one article, but in another his estimate was smaller, only 12 feet long, or 3.7 m, and four or five feet wide, or 1.2 to 1.5 meters. But it doesn’t seem that he or anyone else got a really good look at it.

It was described by numerous people as being gray-skinned. Bateman said it had “the skin of an elephant…with the face of a catfish.” I dug into as many original newspaper articles as I could find without actually paying for access to them, and very few of them have a real description of the animal. The only description given in a New York Times article from July 23, 1937 is this:

“Half a dozen eye-witnesses…reported seeing a great creature rise to the surface at rare intervals, float silently for a few minutes and then submerge, making its presence known only by occasional snorts that bubbled up from the bottom.”

Another article quotes Bateman as saying he saw the monster “lolling on the surface of the water.”

Bateman decided he was going to blow the monster up with dynamite. What is it about people whose go-to solution to seeing an unidentified animal is to throw dynamite in the water? The local authorities said, uh no, you cannot just throw dynamite into the river, but other people brought machine guns and other weapons and patrolled the river looking for the monster. A plan to make a giant net and catch the monster petered out when people found out that making and deploying a net that big is expensive and difficult.

The monster was mostly reported in an eddy of the river that stretched for about a mile and was unusually deep, about 60 feet deep, or 18 meters. The river is about 75 feet wide at that point, or 23 meters. The Newport Chamber of Commerce hired a diver from Memphis named Charles B. Brown, who brought an eight-foot harpoon with him when he descended into the river. He didn’t find anything, but the tourists had fun.

Suggestions as to what the monster might be ranged from a sunken boat that sometimes bobbed briefly to the surface to a monstrous catfish. Many people were convinced it was a huge fish of some kind, especially an alligator gar.

Eventually sightings tapered off and the excitement died down until June of 1971, when it started being seen again. Again the size estimates were all over the place, with one witness saying it was the size of a boxcar, which would be about 50 feet long, or 15 meters, and 9 feet wide, or 2.8 meters. Another witness said it was only 20 feet long, or 6 meters. Some witnesses said it had smooth skin that looked like it was peeling all over, had a bone sticking out of its forehead, and it made sounds that one witness described as similar to both a horse’s neigh and a cow’s moo. On July 5, 1971, three-toed tracks 14 inches long, or 36 cm, were also found on an island together with crushed plants that showed a huge animal had come out of the water.

This time, at least, no one tried to dynamite or even net the monster. Instead, in 1973 Arkansas passed a law creating the White River Monster Refuge along that section of the river, to protect the monster. But no one has seen it since.

There is a photo of the monster taken in 1971, but it’s a blurry Polaroid that was reproduced in a newspaper and the original lost. The photo was taken by a man named Cloyce Warren, who was out fishing with two friends. Warren said it had “a spiny ridged backbone and [was] splashing all around.”

So what could the White River Monster be? Is it a misidentified known animal, a completely unknown animal, or just a hoax?

Obviously people are seeing something in that part of the White River. But it’s reportedly so big that if there was a population living anywhere in the river, it would be spotted all the time. So maybe it’s an animal that only sometimes strays into the White River and actually lives in the much larger Mississippi River—or even in the Gulf of Mexico, where it sometimes swims upriver.

Cryptozoologists and other interested people have made suggestions over the years. One suggestion is that it’s an elephant seal. The northern elephant seal is an enormous animal, although it’s nowhere near 50 feet long. The male is much larger than the female, up to 16 feet long, or 4.8 meters, and bulky with blubber that keeps it warm when diving deeply for food in the Pacific Ocean where it lives.

But wait, the Pacific Ocean? You mean it doesn’t live in the Gulf of Mexico?

Nope, the endangered elephant seal only lives in the Pacific. And the Pacific Ocean is separated from the Gulf of Mexico by a whole lot of the North American continent.

A man named Joe Nickell, who’s a paranormal investigator and who was interviewed on MonsterTalk episode 204, has suggested the White River Monster is a manatee—specifically the Florida manatee, which is a subspecies of West Indian manatee. In the winter it mostly lives around Florida but in summer many individuals travel widely. It’s sometimes found as far north as Massachusetts along the Atlantic coast, and as far west as Texas in the Gulf of Mexico.

The manatee is large, up to 15 feet long, or 4.6 meters, with females being somewhat larger than males. Its skin is gray but since it moves slowly, it can look mottled in color due to algae growing on its skin, and it sometimes also has barnacles stuck to it the way some whales do. It has a pair of front flippers with three or four toenails, no hind legs, and a paddle-like tail. It eats plants and only plants, and is completely harmless to humans, fish, and other animals. Also because it moves slowly and spends a lot of time at the surface, since it’s a mammal and has to breathe air, it’s vulnerable to being injured by boats.

In the 1970s there were only a few hundred manatees alive and it nearly went extinct. It was listed as an endangered species and after a lot of effort by a lot of different conservation groups, it’s now only considered threatened. So while people might recognize a manatee these days, back in the 1970s it was practically unknown everywhere except southern Florida since it was so rare. And in the decades before 1971, people didn’t travel as much and didn’t know much about increasingly rare animals that didn’t live in their particular part of the world.

In other words, it’s completely possible that people from Arkansas would see a manatee in 1915, 1937, and 1971 and not know what it was. But could a manatee really travel that far from the ocean and survive?

The Mississippi River empties into the Gulf of Mexico in Louisiana in the United States. Texas is to the west of Louisiana, then Mississippi, Alabama, and Florida to the east. In other words, it’s well within the known range of the Florida manatee. Manatees are known to sometimes travel up the Mississippi. This happened most recently in October of 2016 when a manatee traveled as far as Memphis, Tennessee before it was found dead in a small lake connected to the river. That’s a distance of 720 miles, or 1,158 km, and that was with wildlife officials trying to capture it to return it to the Gulf. That same year a manatee also traveled as far as Rhode Island along the Atlantic coast. Memphis is actually much farther up the Mississippi than the White River is, so if the manatee had branched off into the White River it might have led to new sightings of the White River Monster.

The manatee can live in fresh water perfectly well. One species, the Amazonian manatee, is a fully freshwater animal that never leaves the South American rivers where it lives. But despite its size, the manatee doesn’t have a lot of blubber or fat to keep it warm. The farther away it travels from warm water, the more likely it is to die of cold.

But while an errant manatee might explain some White River Monster sightings, it doesn’t fit with all of them. Other animals from the Gulf of Mexico sometimes find their way up the Mississippi too. It’s a huge river, and since an ocean animal doesn’t understand what a river is, it doesn’t know it’s never going to reach the ocean again unless it turns around. Most marine animals can’t survive for long in fresh water, but some animals, like the manatee, can tolerate fresh water much better. That’s also the case for the bull shark.

In 1937, the same year the White River Monster was spotted for the second time, a five-foot bull shark, or 1.5 meters, was caught in Illinois, which is even farther upstream from the Gulf of Mexico than Tennessee and Arkansas. Bull sharks live throughout much of the world’s oceans in warmer water near coasts and are often found in rivers and lakes, although they don’t live as long in fresh water as they do in salt water. The largest bull shark ever measured was 13 feet long, or 4 meters, so a large one is about the size of a manatee.

Occasionally a dolphin travels up the Mississippi River, but marine dolphins can’t survive for long in fresh water and will die soon if they can’t make their way back to the ocean. A dolphin in fresh water starts to develop skin lesions and then the skin begins to peel, leading to bacterial infection and death. Remember that some witnesses in 1971 described the White River Monster as a gray animal with peeling skin.

Nine different species of dolphin and many species of whale live in the Gulf of Mexico. Of those, only the bottlenose dolphin lives close to the coast and is usually the species that accidentally travels into fresh water and can’t find its way out. The bottlenose dolphin isn’t any larger than the manatee, up to about 13 feet long, or 4 meters.

1971 was an active hurricane year, including the category 5 Hurricane Edith that killed 37 people in mid-September. Marine animals that can travel quickly, like dolphins and sharks, will flee to calmer waters when a hurricane approaches, and while that usually means out to sea, it wouldn’t be out of the question for a frightened dolphin or other large marine animal to make its way into the Mississippi by accident ahead of a hurricane, especially a hurricane as big as Edith.

Another possible identity for the White River Monster is one that was suggested in 1937, the alligator gar. It’s a freshwater fish that lives throughout the Mississippi River and other rivers and lakes in the southern United States and parts of northern Mexico. The alligator gar gets its name because of its toothy jaws, which do resemble an alligator’s, and it can grow up to ten feet long, or 3 meters. It’s a really weird fish and eventually I’ll probably do a full episode on it and its relatives, just as I have a full episode planned about the manatee. It has gills like other fish, but it can also breathe air through its swim bladder, which is lined with lots of blood vessels that absorb oxygen. Every so often an alligator gar will come to the surface and gulp air to replenish the oxygen in its swim bladder, so it would be seen at the surface briefly but periodically as was described by many witnesses. This is also the case for the manatee and dolphin, who breathe air.

The alligator gar is an ambush predator, which means it waits in the water without moving much at all until an animal approaches. Then it shoots forward and grabs it. It mostly eats small fish, invertebrates of various kinds, and waterfowl like ducks.

The final possibility of the White River Monster’s identity is the gulf sturgeon. It’s a subspecies of the Atlantic sturgeon that lives in the Gulf of Mexico, although it’s also known from various rivers in the southeastern United States. The reason it’s found in rivers is that the gulf sturgeon is anadromous [a-NADro-mus], the term for a fish that migrates from the ocean into fresh water to spawn. The salmon is the most famous anadromous fish, which fights its way upriver to spawn and then die. In the case of the gulf sturgeon, it hatches in fresh water and lives there for the first two years or so of its life before making its way downstream to the ocean. Then it returns to freshwater to spawn every spring, usually the same river where it was hatched, and goes back to the ocean in autumn.

The gulf sturgeon fits a lot of the descriptions of the White River Monster sightings. It’s covered with five rows of scutes that project from the back and sides in a sort of low sawtooth pattern, which fits the “spiny ridged backbone” that Cloyce Warren reported seeing in 1971, and its elongated snout has sensory barbels like a catfish, which matches Bramlett Bateman’s 1937 description of the monster having the face of a catfish. It’s gray, gray-green, or brownish in color with a lighter belly, and it can grow up to 15 feet long, or 4.5 meters, although most are about half that length.

The gulf sturgeon usually migrates in groups, but occasionally one can get separated from its group and find its way into a stretch of water by itself. It also doesn’t eat much during the summer when it’s in freshwater. In the winter it lives just off the coast in shallow water, where it’s a bottom feeder. It sucks up invertebrates from the sea floor, feeling for them with their barbels. It gains lots of weight during the winter and then loses it all in the summer. Sturgeons do sometimes jump out of the water, especially in summer–as much as fix feet out of the water. No one’s sure why. Also during the summer, the sturgeon makes a sound like a creaky hinge.

I think it’s probable that the White River Monster sightings are of more than one type of animal, and while we can make an educated guess as to which animals might have been spotted and misidentified, we can’t know for sure. So while at least some of the sightings may have been of a manatee or a gulf sturgeon or another of the animals we talked about today, there’s also the possibility that something else occasionally swims up the Mississippi from the Gulf and into the White River. Hopefully, next time the White River Monster appears, someone gets a really good look at it and some good pictures so we know for sure.

This is what a sturgeon sounds like, by the way:

[sturgeon creaky sound]

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 and get twice-monthly bonus episodes.

Thanks for listening!

Episode 152: The Freshwater Seahorse and Other Mystery Water Animals

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This week let’s look at some (mostly) smaller mystery animals associated with water! Thanks to Richard J., Janice, and Simon for the suggestions!

Further reading:

What Was the Montauk Monster?

The black-striped pipefish. Also, that guy has REALLY BIG FINGERTIPS:

The Pondicherry shark, not looking very happy:

A ratfish. What BIG EYES you have!

The hoodwinker sunfish, weird and serene:

The Montauk monster, looking very sad and dead:

Show transcript:

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

Let’s finish off the year with an episode about a few mystery animals, specifically a few mystery animals associated with water. Thanks to Richard, Janice, and Simon for the suggestions!

We’ll start off with a mystery suggested by Richard J, but not the Richard J. who is my brother. A different Richard J. Apparently half the people who listen to my podcast are named Richard, and that’s just fine with me.

Richard wanted to know if there are there such things as freshwater seahorses. We’ve talked about seahorses before in episode 130, but seahorses are definitely marine animals. That means they only live in the ocean. But Richard said he’d heard about a population of seahorses native to Lake Titicaca in Bolivia, which is in South America. I put it on my suggestions list, but Richard was on the case. He sent me a link to an article looking into the mystery, which got me really intrigued, so I bumped it to the top of my list. Because I can do that. It’s my podcast.

Freshwater seahorses are supposedly known in the Mekong River and in Lake Titicaca, and sometimes you’ll see reference to the scientific name Hippocampus titicacanesis. But that’s actually not an official scientific name. There’s no type specimen and no published description. Hippocampus is the generic name for many seahorse species, but like I said, they’re all marine animals and there’s no evidence that any live in freshwater at all. Another scientific name supposedly used for the Mekong freshwater seahorse is Hippocampus aimei, but that’s a rejected name for a seahorse named Hippocampus spinosissimus, the hedgehog seahorse. It does live in parts of the Indo-Pacific Ocean, including around Australia, especially in coral reefs, and sometimes in the brackish water at the Mekong River’s mouth, but not in fresh water.

On the other hand, there’s no reason why a seahorse couldn’t adapt to freshwater living. A few of its close relatives have. There are a few species of freshwater pipefish, and in the world of aquarium enthusiasts they are actually sometimes called freshwater seahorses. The pipefish looks like a seahorse that’s been straightened out, and most of them are marine animals. But some have adapted to freshwater habitats.

This includes the black-striped pipefish, which is found off the coasts of much of Europe but which also lives in the mouths of rivers. At some point it got introduced into the Volga River and liked it so much it has started to expand into other freshwater lakes and rivers in Europe.

The pipefish is closely related to the seahorse, but while it does have bony plates like a seahorse, it’s a flexible fish. It swims more like a snake than a fish, and it can anchor itself to vegetation just like a seahorse by wrapping its tail around it. It mostly eats tiny crustaceans and newly hatched fish, since it swallows its food whole. It usually hides in vegetation until a tiny animal swims near, and then it uses its tube-shaped mouth like a straw to suck in water along with the animal. Just like the seahorse, the male pipefish has a brooding pouch and takes care of the eggs after the female deposits them in his pouch.

So where did the rumor that seahorses live in the Mekong come from? The Mekong is a river in southeast Asia that runs through at least six countries, including China, Thailand, Cambodia, and Vietnam. Parts of it are hard to navigate due to waterfalls and rapids, but it’s used as a shipping route and there are lots of people who live along the river. Like all rivers, it’s home to many interesting animals, including a type of giant softshell turtle that can grow up to six feet long, or 1.8 meters, a type of otter, a bunch of enormous fish, including three species of catfish that can grow up to almost ten feet long, or 3 meters, and a giant freshwater stingray that can grow up to 16 feet long, or 5 meters, and of course lots more animals that aren’t as big or as impressive, but which are still important to the river’s biodiversity. But there’s no evidence of seahorses anywhere throughout the Mekong’s 2700 mile length, or 4,350 km.

But there is a hint about where the rumor of a Mekong seahorse could have come from. One researcher named Heiko Bleher chased down the type specimens of the supposed Mekong seahorse in a Paris museum, which were collected in the early 20th century by a man named Roule. Roule got them in Laos from a fisherman who had nailed the dried seahorses to his fishing hut. The fisherman told Roule the seahorses were from the Mekong, but when they were further studied in 1999 Roule’s specimens were discovered to actually be specimens of Hippocampus spinosissimus and Hippocampus barbouri. Both are marine fish but do sometimes live in brackish water at the mouth of the Mekong. So the fisherman wasn’t lying, but Roule misunderstood what he meant.

As for the freshwater seahorse supposedly found in Lake Titicaca, that one’s less easy to explain. Titicaca is a freshwater lake in South America, specifically in the Andes Mountains on the border of Bolivia and Peru. It’s the largest lake in South America and is far, far above the ocean’s surface—12,507 feet above sea level, in fact, or 3,812 meters. It’s also extremely deep, 932 feet deep in some areas, or 284 meters. It’s home to many species of animal that live nowhere else in the world. Why couldn’t it be home to a freshwater seahorse too?

Titicaca was formed when a massive earthquake some 25 million years ago essentially shoved two mountains apart, leaving a gap—although technically it’s two gaps connected with a narrow strait. Over the centuries rainwater, snowmelt, and streams gradually filled the gaps, and these days five rivers and many streams from higher in the mountains feed water into the lake. Water leaves the lake by the River Desaguadero and flows into two other lakes, but those lakes aren’t connected to the sea. Sometimes they dry up completely. So Titicaca isn’t connected to the ocean and never was, and even if it was, seahorses are weak swimmers and would never be able to venture up a river 12,000 feet above sea level. Some 90% of all fish in the lake are found nowhere else in the world. There’s just simply no way a population of seahorses could have gotten into the lake in the first place, even if they could survive there.

That doesn’t mean there aren’t any freshwater seahorses out there ready to be discovered, of course. But I don’t think you’re going to find any in Lake Titicaca. And I have no idea how the rumor got started that any live there.

From a tiny seahorse let’s move on to a small shark, another topic suggested by Richard J. The Pondicherry shark grows to about 3.3 feet, or 1 meter, and once lived throughout the Indo-Pacific, especially in coastal waters. It’s considered critically endangered, but it’s so rare these days that we hardly know anything about it except that it’s harmless to humans, eats small fish and other small animals, and was once common. But until the mid-2010s, scientists were starting to worry it was already extinct. Then in 2016 two different Pondicherry sharks were photographed in two different places—and not where anyone had expected to find it. Some tourists took a photo of one in a river called the Menik and a freshwater fish survey camera caught a photo of one in the Kumbuk River. Both rivers are in Sri Lanka. Since then researchers have spotted a few more. The shark is protected, and hopefully the excitement around the shark’s rediscovery has helped people in the area learn about it so they know not to bother it. Some sharks tolerate fresh water and brackish water quite well, so it’s not surprising that the Pondicherry shark has moved into the rivers where it has less competition from commercial fishing boats.

Our next water mystery is actually not really a mystery, just a really strange-looking fish related to sharks. This one was suggested by my aunt Janice who doesn’t actually listen to the podcast but who likes to send me links to strange animal articles that she comes across on the internet. This one is called Chimaera Monstrosa, sometimes called the rat fish.

The rat fish mostly lives in the deep sea, although it’s sometimes seen in shallower water, and can grow up to 5 feet long, or 1.5 meters. It’s mostly brown but has white markings. Its body looks more or less like a regular plump shark-like fish, but it has great big round green eyes, relatively long pectoral fins, and a very long tail that tapers to a point. The tail gives it its common name, since it kind of resembles a rat’s tail. It eats whatever it can catch on the ocean floor, including crustaceans and echinoderms.

Ratfish, and other chimaeriformes, are most closely related to sharks, and like sharks they have skeletons that are made of cartilage instead of bone. Since they’re rarely seen and look really weird, every so often someone catches one and posts about it online, and then my aunt sends me a link. They are really interesting fish, though.

Simon also sent me an article about an interesting fish a while back, the hoodwinker sunfish. We talked about the sunfish, or mola mola, in episode 96. The hoodwinker sunfish, or mola tecta, was only discovered in 2017 despite its large size. So far it’s known to live in the South Pacific around New Zealand, Australia, South Africa, and Chile, but only off the southernmost parts of those countries. But in early 2019 one washed up in Southern California.

The mystery sunfish was measured at almost 7 feet long, or 2.1 meters. An intern at the University of California at Santa Barbara found it, but didn’t know what it was. But once photos of the fish were posted online, two experts from Australia recognized it immediately—but because it showed up so far out of its known range, they were cautious about IDing it from just a photo. That’s despite the fact that one of the experts, Marianne Nyegaard, was actually the person who named the species. She asked for samples and more photos, and when she got the results, it really was a hoodwinker sunfish. But what was it doing in the warm waters of the northern Pacific instead of the cold southern waters? No one knows except the sunfish.

Let’s finish with another mystery animal you may have heard of. On July 12 or 13, 2008, depending on which source you consult, three friends visited Ditch Plains Beach, two miles away from the little town of Montauk in New York state in eastern North America. It was a hot day and the beach was crowded, and when the three noticed people gathered around something, they went to look too. There they saw a weird dead animal that had obviously washed ashore. One of the three took a picture of it, which appeared in the local papers and then the local TV news along with an interview with the three. From there it went viral and was dubbed the Montauk monster.

The monster was about the size of a cat, but with shorter legs and a chunkier body, and a relatively short tail. It didn’t have much hair but it did have sharp teeth, and the front part of its skull was exposed so that it almost looked like it had a beak. Its front paws were elongated with long fingers, almost like little hands.

So what was the monster? People all over the world made guesses, everything from a sea turtle without a shell to a diseased dog or just a hoax. Some people thought it was a mutant animal that had been created in a lab on one of the nearby islands, escaped, and died trying to swim to the mainland.

But while no one knows what happened to the animal’s body, scientists have studied the photo and determined that it was probably a dead raccoon that had been washed into the ocean. The waves had tumbled the animal’s body around through the sand long enough to rub off most of its remaining fur and some of its facial features, and then it washed ashore during the next high tide. It was also somewhat bloated due to gases building up inside during decomposition. It’s the animal’s teeth and paws that made the identification possible, since both match a raccoon’s exactly. Remember that raccoons have clever front paws that help them open locking trash bins, as we learned in episode 138.

So the Montauk monster isn’t actually a mystery, except what happened to it, but don’t be discouraged. There are still lots of genuinely mysterious animals in the ocean, from misplaced sunfish to creatures no one has ever seen yet. Maybe you’ll be the one to discover them.

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 at Patreon.com/strangeanimalspodcast if you’d like to support us and get twice-monthly bonus episodes.

Thanks for listening!

Episode 150: Hamsters, Gerbils, and Ferrets

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This week we venture into the land of CUTE to learn about hamsters, ferrets, and some other small domesticated animals. Thanks to Kim and the Angel City Ferret Club for the suggestions!

Hamsters are SO CUTE:

Hamsters have giant cheek pouches to carry food in:

Gerbils are also SO CUTE:

Ferrets are SO CUTE in a totally different way:

The black-footed ferret does not want anything to do with the domestic ferret, thank you:

An extremely complicated but neat way to use your pet’s exercise wheel to generate power:

Hamster-Powered Night Light

Show transcript:

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

Back in episode 106 we learned about domestication, especially the domestication of dogs and other canids. But recently, Kim suggested an episode about the domestication of other animals, like hamsters and ferrets. Then the Angel City Ferret Club suggested I talk about ferrets too. So this week, let’s learn about hamsters, gerbils, and ferrets.

Hamsters are rodents, and there are lots of different species. The most common domesticated hamster is the golden hamster, also called the Syrian hamster, which is indeed from Syria. A DNA study of domesticated golden hamsters indicate that they’re all descended from a single female captured in Syria in 1930 and kept as a laboratory animal. It wasn’t long before some of her babies became pets, because hamsters are incredibly cute.

The golden hamster is about five inches long, or 13 cm, and is a chunky little rodent with a little nub of a tail, short legs, and rounded ears. And a little pink nose and shiny black eyes. I had a pet hamster named Wembley when I was little. It’s a golden tan in color with lighter fur underneath, and some breeds of domesticated golden hamsters may have white spots on the body or long fur.

Some other hamster species, most of which aren’t kept as pets, can grow much larger than the typical golden hamster. The European hamster, which lives in parts of eastern Europe, can grow up to 14 inches long, or 35 cm. It’s mostly brown with white patches. One of the smallest hamster species is Campbell’s dwarf hamster, which is sometimes kept as a pet but is originally from Mongolia. It grows about three inches long, or 8 cm. It’s brown-gray in color with a darker stripe down the middle of its back and pale gray fur underneath.

All hamsters have cheek pouches that extend down to their shoulders. In the wild, a hamster tucks food into its cheek pouches to carry back to its burrow, where it pushes the food out by pressing its forefeet against its sides and pushing them forward. Campbell’s dwarf hamster has cheek pouches that are big even compared to other hamsters. They extend all the way down the sides of its body.

Hamsters in the wild like warm areas without a lot of rain, like deserts and dry grasslands. They dig well and spend most of their time underground when they’re not out searching for food. They’re most active at dawn and dusk, although they’re nocturnal to some degree also. In cold weather some species hibernate for short periods of time, generally only a few days. A hamster’s burrow can be pretty elaborate, with several entrances, a cozy sleeping burrow, a pantry where the hamster stores food, and even a bathroom where the hamster urinates. Hamsters are hindgut fermenters, and like some other rodents and rabbits, some of the poops they produce aren’t waste material, they’re partially digested food that the hamster eats again to gain as much nutrients from it as possible.

Hamsters are omnivores, eating seeds and other plant material as well as insects and other small animals. Occasionally wild hamsters hunt together to catch insects, although in general the hamster is a solitary animal. In addition to its ordinary diet of hamster food, a pet hamster likes seeds and nuts, green vegetables, root vegetables like carrots, a little bit of fruit, and other plant foods, but shouldn’t be given people food since it can contain too much salt, sugar, or other additives that can harm it. Give your hamster deep bedding that it can burrow into to sleep and dig around in, but cedar shavings can be bad for their lungs. Paper bedding made for small pets is safest. And, of course, your hamster needs to chew to keep its teeth from growing too long, since like other rodents its teeth continue to grow throughout its life. It also needs an exercise wheel and toys designed for hamsters so it can get exercise and have fun. You can find good books about how to care for a hamster in the library. I mean you can find a book on hamster care in the library, not how to turn your hamster into a tiny furry librarian.

Hamsters don’t see very well but have a good sense of smell and hearing, and in fact they communicate mostly in the ultrasonic range—too high-pitched for humans to hear most of their calls. Generally hamsters only call to each other during courtship, when a male and female are trying to decide if they’ve found a good mate.

I tried to find audio of hamster calls, pitched down so humans could hear it, but had no luck. I guess the sound of their calls is a secret only hamsters know.

Gerbils are also closely related to mice and therefore to hamsters, and have a lot in common with the hamster. Both are about the same size but the gerbil is smaller, less chunky, and has a much longer tail. The tail has fur on it and helps the gerbil retain its balance while climbing.

There are a lot of gerbil species, all of them native to dry areas like deserts and grasslands in parts of Asia and Africa. The Mongolian gerbil was domesticated in the late 19th century but wasn’t well known until the 1950s when it became a popular pet. In the wild the Mongolian gerbil is a gray-brown color but pets have been selectively bred to produce colors from white to black with various patterns. Unlike the hamster, the gerbil is a social animal and is healthier when it lives with at least one other gerbil. It also likes to burrow in its bedding and needs to chew to keep its teeth from growing too long. It’s important to get an exercise wheel that’s solid instead of having rungs, since otherwise the gerbil could catch its tail between the rungs and get injured.

In the wild, gerbils live in groups with extensive burrows, sometimes connected with the burrows of other groups. It has a good sense of smell and if a gerbil whose smell it doesn’t recognize approaches, the two will probably fight. The Mongolian gerbil grows about 2 ½ inches long, or 6 cm, not counting its tail, which is about the same length as its body. But the biggest species of gerbil is the great gerbil from central Asia. It grows up to 8 inches long, or 20 cm, not counting its tail. That’s the size of a squirrel.

If a gerbil feels threatened or nervous, it may thump its hind legs on the ground to warn other gerbils. Other gerbils that hear the thumping may also start thumping. Sometimes pet gerbils will start thumping in response to rhythmic sounds in a house, like a washing machine on a spin cycle. This is hilarious, but of course if your pet gerbil is thumping you should look around to see if there’s something near its cage that it finds frightening, like a pet dog or a light that’s too bright. This is what a gerbil sounds like when stamping its tiny feet.

[gerbil thumping sound]

Next, let’s look at the ferret. The ferret isn’t a rodent. It’s a type of weasel called the European polecat, which has been domesticated. Unlike the hamster and gerbil, which are small and somewhat delicate animals, the ferret is much larger and more robust. It grows nearly two feet long, or almost 60 cm, with a long, slender, flexible body, long neck, and short legs.

The ferret is generally a crepuscular animal, meaning it’s most active at dawn and dusk. It’s solitary in the wild, but domesticated ferrets are much more social. It likes to burrow, and in the wild it sleeps in a burrow during the day.

No one is sure when the ferret was domesticated, but it may be descended from animals kept to hunt for rats and rabbits. Like other members of the weasel family, ferrets are carnivores and evolved to be slender and short-legged to fit into burrows of smaller animals. There’s even a term for hunting with a ferret, called ferreting. It was also used to keep mice and rats out of grain stores. Ferret breeders selected for white or albino ferrets because they were easier for their handlers to see, so many pet ferrets are albinos.

The ferret makes a good pet although it’s an intelligent, active animal and will get into all sorts of mischief if it doesn’t have enough to do. It likes to climb, explore, and solve puzzles, and needs lots of exercise and a safe place to play. The ferret can be litter trained like a cat and trained to wear a harness and walk on a leash like a dog. It’s sociable so it’s always better to have more than one ferret if you can.

The ferret needs to eat frequently, so it’s a good idea to keep a feeder full of ferret kibble where your pet can eat whenever it’s hungry even if you’re not home. Since ferrets are carnivores like cats are, your pet’s diet should be high in animal-based protein and fat. If you can’t find ferret food in your area, you can feed high-quality cat kibble, but food formulated just for ferrets is best. For treats, ferrets like cooked eggs, freeze-dried liver treats that you can get for dog training, and small pieces of cooked meat. You shouldn’t feed fruit to your ferret, since it can lead to digestive issues.

Ferrets are illegal to own in some areas because escaped and released ferrets can breed in the wild and cause a lot of problems as an invasive species. This is particularly true in small, fragile ecosystems like islands, so it makes sense that Hawaii doesn’t allow ferrets or many other animals as pets, including gerbils and hamsters.

Ferrets occupy the same ecological niche as the black-footed ferret, and the black-footed ferret is the most endangered mammal in North America. It was even declared extinct in 1979, but a small population was re-discovered in 1981 in Wyoming. Some of these animals were captured for a captive breeding program, so even though the black-footed ferret was declared extinct in the wild in 1996, the breeding program was able to reintroduce ferrets in parts of its original range in the western part of North America. It’s now considered an endangered species, which is still pretty bad but not as bad as extinct.

The black-footed ferret primarily eats prairie dogs, and prairie dogs are also on the decline due to habitat loss, poisoning and killing of them by ranchers and farmers, and disease. So saving the black-footed ferret also means saving the prairie dog. However, pet prairie dogs are legal to own in most states even though they’re not really domesticated animals and they can spread diseases fatal to humans, like bubonic plague. And since prairie dogs don’t breed well in captivity many animals sold as pets were captured in the wild, and many of them die soon after being captured.

But while feral domesticated ferrets are a problem in some areas, there don’t seem to be any feral populations of ferrets in the United States. It looks like ferret owners in North America take good care of their pets and make sure they don’t get out and cause problems for wildlife.

California has a lot of restrictions about what animals can be kept as pets. Ferrets are not allowed. Neither are gerbils, prairie dogs, or hedgehogs. But you can keep hamsters and chinchillas as pets in California, rabbits, camels, wolf-dog hybrids, and most birds including ostriches. The only reason I even mention California’s restrictions on pets is because the Angel City Ferret Club is working to get the ferret ban changed, and they told me all about it.

I don’t live in California so I don’t want to get involved in the debate. But wherever you live and whatever pet you have, always make sure that you know how to take care of it properly and that you only buy your pet from an ethical and reputable breeder. And, of course, never release a pet into the wild if you can’t take care of it anymore. Most of the time your pet will die of cold, starvation, injury, or predation from a wild animal. If you can’t find someone who can take your pet, contact your veterinarian who can give you information about rescue services in your area.

That is a super depressing way to end an episode, so let’s finish up with something cute and interesting. If you’ve ever watched a hamster or other small pet run on an exercise wheel, you may have wondered how much energy the little fuzzball was generating and if it could charge your phone or power a light. Well, other people have wondered the same thing. I found a how-to article at Otherpower.com detailing how they made a working power generator from a hamster wheel. Their pet hamster Skippy was easily able to power a nightlight while running on his wheel. I’ve put a link to the article in the show notes. It looks really complicated but if you’re an engineer type of person you might look at it and think, “Oh, that’s simple and fun! Let’s try it!”

There’s even a new company based in Taiwan that’s marketing exercise equipment that generates energy as people use it. People are a lot bigger and stronger than hamsters, so we can generate a lot more energy by running on a treadmill or working out on a stationary bike, enough to power the lights in the room where the equipment is. Gyms that have installed the equipment report that users feel more motivated to exercise longer and harder when they know they’re generating power. That’s good for the person and helps reduce energy use for the gym. And that’s good for everyone, including our small pets.

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 148: Gastric Brooding and Other Frogs

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Thanks for Merike for suggesting the gastric brooding frog and to Hally for suggesting newly-discovered frogs!!

The Gastric brooding frog:

Darwin’s frog, round boi:

The Surinam toad carries her eggs and tadpoles in the skin of her back:

Kermit the frog and a newly discovered glass frog:

Show transcript:

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

This week we have another fantastic listener suggestion, about frogs! Merike is a herpetologist from Estonia, who suggested the gastric brooding frog, and another listener, Hally, also wanted to learn about some of the new frog species discovered recently.

The gastric brooding frog is native to eastern Australia, specifically Queensland. There are two species, and both of them live in creeks in separate rainforests. The habitat is specific and small, and unfortunately both species went extinct less than forty years ago. Researchers aren’t sure why they went extinct, but it was probably due to pollution and habitat loss.

The gastric brooding frog was a slender frog, with the northern gastric brooding frog being about three inches long, or about 8 cm, while the southern gastric brooding frog was about half that size. Females were larger than males. It was grey or brown-gray in color with some darker and lighter patches on the back with a lighter belly. During the day it spent most of its time at the water’s edge, hidden in leaf litter or among rocks, although it generally only fully came out of the water when it was raining. It ate insects and may have hibernated in winter.

As you may have guessed from its name, the gastric brooding frog had a unique way of taking care of its eggs. After the eggs were fertilized, the female would actually swallow the eggs and keep them in her stomach while they developed. Even after the eggs hatched into tadpoles, they stayed in the mother’s stomach. As they grew larger, the stomach also grew larger, until it pretty much filled up the mother’s insides, to the point where she couldn’t even use her lungs to breathe. Fortunately many frogs, including the gastric brooding frog, can absorb a certain amount of oxygen through the skin. Finally the tadpoles metamorphosed into little frogs, at which point the mother regurgitated one or a few of them at a time, or sometimes all of them at once if she felt threatened.

So how did the mother keep from digesting her own eggs or tadpoles? How did she eat when her stomach was full of babies? How did the babies eat?

The jelly around the gastric brooding frog’s eggs contained prostaglandin E2, also called PGE2, which causes the stomach to stop producing hydrochloric acid. That’s a digestive acid, so once the eggs were inside the stomach, the stomach basically stopped stomaching. There is some speculation that the first eggs the mother frog swallowed actually got digested, but then the acid production stopped and the rest of the eggs remained. Once the eggs hatched, the tadpoles also produced PGE2 in the mucus in their gills.

The tadpoles continued to live off the yolk sac from their eggs as they developed, and in fact their mouths weren’t even connected to their gut yet. As for the mother, she just didn’t eat until the babies were developed and released into the water on their own, which took about six weeks.

The gastric brooding frog is the only frog known to raise its babies this way, but other frog species have interesting variations of the usual way frogs reproduce. Most female frogs lay their eggs, and then the male fertilizes them. But about a dozen species of frog have developed internal fertilization, where the female retains the eggs in her body until the male fertilizes them. The tailed frog from California in the United States, in North America, gets its name from a structure that looks like a tail, but is actually an extension of the cloaca. That’s the opening used for both excretion and reproduction. Only males have the tail, and it works like a penis to fertilize the female’s eggs without her needing to lay the eggs first. Once they’re fertilized, she can choose just the right spot to lay the eggs.

Another weird way frogs take care of their eggs is something that Darwin’s frog does. Darwin’s frog lives in Chile and Argentina in South America, and grows to a little over an inch long, or 3 cm. It has a pointy snout that gives its head a wedge  shape something like a leaf, which helps keep it camouflaged on the forest floor. The female lays her eggs in damp leaf litter, and after the male fertilizes them he guards them for several weeks. When they start to move as they develop, the male swallows them—but instead of his stomach, he stores them in his vocal sac. That’s the expandable sac in the frog’s throat that males use to make their croaking sounds by filling the sac with air.

The eggs hatch into tadpoles, which the male carries around as they grow. They live off their egg yolks, but they also eat secretions from the lining of the vocal sac. Once the tadpoles metamorphose into little frogs, they hop out of the male’s mouth and are on their own. Until then, the male doesn’t eat.

The Surinam toad is a species of frog. Remember that all toads are frogs but not all frogs are toads. It lives in wetlands and forests in northern South America, and has a radically different way of keeping its eggs safe. The Surinam toad is a flattened, broad toad that can grow up to 8 inches long, or 20 cm, and looks a lot like a dead leaf. It lives in slow-moving water. Unlike other frogs it doesn’t have a tongue, so instead of catching insects with its sticky tongue, it grabs them with its hands. It’s sometimes called the star-fingered toad because its long, thin fingers have tiny star-shaped appendages that help it catch prey. Instead of croaking, male Surinam toads make a clicking noise by moving a small bone in the throat back and forth.

When the female is ready to lay her eggs, a male clasps her around the middle like most frogs do while mating. But instead of just releasing her eggs and letting the male release sperm to fertilize them, the female makes a sort of flipping movement in the water as she releases a few eggs at a time. The male fertilizes them, then presses them onto her back. The skin of the female’s back grows up over the eggs, embedding them in the skin in little pockets. When the tadpoles hatch they stay in these little pockets as they develop. They only leave when they’ve metamorphosed into tiny toads, at which point they emerge and live on their own. The mother then sheds the layer of skin on her back where her babies lived.

A frog described in 2014 that lives in parts of South Asia gives birth to tadpoles instead of laying eggs. It’s a species of fanged frog, which are frogs that do actually have teeth unlike most frogs. Limnonectes larvaepartus grows about 1 ½ inches long, or just under 4 cm. The eggs are fertilized internally, but instead of laying them the female keeps them in her oviducts until they hatch. They remain inside her until they no longer have any yolk left to nourish them, at which point the mother releases them into a slow-moving stream.

Lots of other interesting frogs have been discovered recently. A new frog discovered in southern India in 2018 was recently determined to be a member of its own genus. It’s called the narrow-mouthed frog and had gone unnoticed even though it lives in an area that’s been extensively explored by scientists. It only comes out into the open for less than one week out of the year during the short breeding season, and the rest of the time it hides. Obviously, we don’t know much about it yet.

In 2016 in the same area as the narrow-mouthed frog, researchers discovered a new species of frog with a tadpole that burrows through sand. It’s a member of the Indian dancing frog family, and not only do the tadpoles burrow through wet sand at the bottom of streams, they have ribs that help them move around more easily. Tadpoles are usually just squidges without bones. Dancing frogs get that name because the males wave their feet to attract females during mating season.

There are so many recently discovered frog species that it’s hard to know which ones to highlight. You know, like the new glass frog from Costa Rica described in 2015 that honestly looks just like Kermit the Frog, if Kermit had a translucent belly that showed his organs. Scientists don’t know why glass frogs have no pigmentation at all on their bellies. Or the three tiny frog species discovered in Madagascar and described earlier in 2019, all of them smaller than your thumbnail, that belong to a new genus, Mini. Their scientific names are therefore Mini mum, Mini scule, and Mini ature. The three are related to one of Madagascar’s biggest frogs, which grows over four inches long, or 10.5 cm, as opposed to the Mini frogs which top out at about 15 mm long. Hally sent me an article about eleven new species of frog discovered recently in the Andes, including the multicolored rain frog. It’s sometimes yellow, sometimes brown, sometimes green, speckled, splotched, spotted–so variable that at first scientists thought they were different related species. All eleven of the Andes frogs lay their eggs on land, and instead of hatching into tadpoles the eggs hatch into tiny froglets.

Frogs and other amphibians are sensitive to environmental change, which means a lot of species have either recently gone extinct or are critically endangered. Habitat loss and an amphibian fungal disease that has spread around the world are also making things hard for frogs and their relations. Scientists have been working hard lately to find species that are rare, suspected to be extinct, or are unknown to science, to learn about them while we can and do our best to preserve the species, either in the wild or in captivity. There are even multiple genetic resource banks, or biobanks, to preserve genetic material of frogs and other animals so that future scientists might be able to clone them.

There’s always the possibility that the gastric brooding frog isn’t actually extinct. The southern gastric brooding frog hasn’t been seen since at least 1981 despite extensive searches, though, with the last captive individual dying in 1983. The northern gastric brooding frog was only discovered in 1984 but hasn’t been seen since 1985.

But even if there aren’t any left in the wild, all hope isn’t lost. The gastric brooding frog is a good candidate for de-extinction, and cloning has actually been successful to a limited degree already. In 2013 a living embryo was produced from preserved genetic material, although it didn’t survive. Researchers are still working to clone the frogs and keep them alive. With luck the attempt will be successful, and not only can a population of the frogs be kept in captivity, they can be reintroduced to their former habitat one day.

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 139: Skunks and Other Stinkers

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This week we’re commemorating my HOUSE getting SKUNKED by a SKUNK and it was STINKY

The skunk, stinky but adorkable, especially when it’s eating yellow jackets:

The stink badger looks like a shaved skunk with a bobbed tail:

The zorilla wants to be your stinky friend:

A woodhoopoe, most magnificent:

A Eurasian hoopoe, looking snazzy:

Show transcript:

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

This week we’re going to learn about some animals that are infamous for their stinkiness. This wasn’t the topic I had planned on for this week, but last week my house got skunked. That is, a skunk sprayed an animal very close to my house, which means I woke up at 4:45am gagging from the smell of point-blank skunk odor. And this was with the windows closed and the air conditioning going. It was so bad I thought I would throw up, so I yanked on my clothes, grabbed my purse, and fled the house at 5:30am. I went to work early—don’t worry, I got coffee on the way—and spent the whole day smelling skunk faintly where the smell clung to my hair and, oddly, my phone case. Also I spent the whole day complaining to my coworkers.

Fortunately, when I got home the smell had dissipated somewhat, so I opened all the windows and doors and by the next morning it was mostly gone. But it got me wondering why skunk spray smells so, so bad and how many other stinky animals are out there.

The skunk is native to North and South America, although there are two species of related animals that live in some of the islands of the Malay Archipelago, called stink badgers. No seriously, that’s really what they’re called. Skunks and stink badgers are related to actual badgers and to weasels, but not closely.

The stink badger is black or dark brown with a white stripe that runs from its head down the back of its neck and along its spine, and finishes at its little short tuft of a tail. The skunk is black or dark brown with one or two white stripes or white spots, depending on the species, which continues down its long fluffy tail. In all cases, though, these stinky animals are vividly patterned with dark fur and bright white markings as a warning to other animals. Do not get too close or there’s a world of stink coming your way. Also, I can verify from my own experience that the white markings of a skunk make it much easier to see in the darkness and therefore avoid. Since the skunk is crepuscular, meaning it’s most active around dusk and dawn, that’s important. The stink badger is more nocturnal than the skunk.

Both the skunk and the stink badger have relatively short legs with sharp claws. Both are relatively small, about the size of a cat. Both are also good diggers and spend the daytime asleep in their burrows. In winter the skunk doesn’t hibernate but it does stay in its burrow more, spending most of its time asleep. This is the best way to deal with winter cold, if you ask me.

Female skunks share a den in the winter but males are usually solitary. This means the females retain a higher amount of body fat when the weather warms up, since they didn’t need to burn that fat to keep themselves warm. Researchers think this helps the females stay in better condition for a spring pregnancy. Meanwhile, males are skinnier at the beginning of the winter but by staying alone they’re less likely to contract disease or parasites.

Mating season for skunks is in spring and babies are born in early summer. They mostly stay in the burrow for about two months, then start accompanying their mother when she goes out foraging. The mother is really protective of her babies and will spray any animal that approaches.

Although the skunk can hear and smell well, it has poor vision. That’s why so many are killed by cars. The skunk’s biggest predator is the great horned owl, because owls don’t have much of a sense of smell and don’t care about being sprayed.

The skunk and the stink badger are both omnivorous and will dig up grubs and earthworms, will sometimes eat carrion, and also eat frogs, crustaceans, and other small animals, leaves and other plant parts, especially berries and nuts, and insects. The skunk especially likes bees. It has thick fur that helps protect it from stings, and will eat all the bees it can catch.

The skunk also eats other stinging insects, including the dreaded yellow jacket. That’s a type of wasp that’s common where I live, with incredibly painful stings. A few years ago I noticed a yellow jacket nest in the ground behind my garage, and that night when the yellow jackets were asleep I carefully trimmed the long grass around the nest opening to see how extensive it was. Then I made a mental note to get some yellow jacket poison the following day. When I went back out to deal with the nest the next night, it was gone. A skunk had discovered it, probably because I’d exposed it by trimming back the grass, and had dug the whole nest up to eat the yellow jackets. There wasn’t a single one left. Ever since I have been lowkey fond of skunks, although I do wish they wouldn’t spray so close to my house.

So what is skunk spray and why is it so stinky? The skunk has two anal glands that contain an oily liquid made up of sulfurous chemical compounds. If a skunk feels threatened, it will raise its tail and fluff it out as a warning. It may also hiss, stomp its feet, and pretend to charge its potential attacker. The skunk doesn’t actually want to spray if it can avoid it, though. Its anal glands only hold enough of the oil to spray a few times, and when the skunk runs out it can’t spray again for almost two weeks. But if its warnings don’t work, it will use muscles to contract the glands and spray the oily liquid more than ten feet, or 3 meters.

If you’ve only ever smelled skunk spray in the distance, you may not think it’s so bad. But the smell is horrific up close, strong enough to induce vomiting, and it can cause irritation to the skin or even temporary blindness if it gets in the eyes. And the skunk is really accurate when spraying, aiming at the face. Not only that, because it’s an oil, the spray clings to skin, hair, or fur, and it won’t just wash off. It can literally take weeks to wear off normally. If your clothes get sprayed, or your dog’s collar, the smell will never come out and you will have to throw the clothes away.

Domestic dogs get sprayed by skunks a lot. Some dogs just never learn. I once had a cat who was sprayed by a skunk too. You may have heard that you can remove the smell by washing your pet in tomato juice, but this actually doesn’t work. I asked a veterinarian how to clean up my cat, and this is what she told me. This worked great, by the way.

Mix hydrogen peroxide about half and half with warm water and add about a spoonful of dishwashing liquid. Rub the mixture into the fur thoroughly, making sure to work it in well right down to the skin. If you can tell where the spray is, concentrate on that part. Do your best not to get the mixture into your pet’s eyes, and make sure to use good warm water. Part of the reason animals hate getting bathed is because they get cold really easily once their fur is wet, so using really warm water helps. Then rinse your pet thoroughly, making sure to get all the soap out so they won’t get itchy. You may need to mix up another batch of the hydrogen peroxide, water, and soap and give the stinkiest areas another wash. After you’ve rinsed your pet thoroughly, wrap them up in a towel and gently squeeze as much of the water out of the fur as you can. Then make sure you have a dry towel to put in your pet’s bed or basket or wherever it wants to hide after its horrible bath.

In July of 2019 a research team published a report about a type of fungus that makes a chemical called pericosine A that neutralizes noxious chemicals. The researchers tested pericosine on skunk spray and discovered that it neutralized the smell harmlessly. So it’s probably just a matter of time before pericosine is marketed to veterinarians to help pet owners. Let’s hope so.

Even skunks don’t like to be sprayed, incidentally. Males fight each other during mating season and will sometimes spray each other. A skunk reacts like any other animal when it gets sprayed.

The zorilla is another stinky animal related to the skunk, although it lives in parts of Africa. It’s brown with white markings and is sometimes called the striped polecat or African skunk. It’s about the same size as a skunk or stink badger and looks and acts very similar, although it’s a carnivore and much more social than the skunk. It’s also related to the honey badger, which we talked about in episode 62. If you remember, the honey badger is also black with a broad white or silvery stripe down its back, and it can invert its anal sacs and discharge a stinky oil, although it doesn’t spray like a skunk.

It’s not really surprising that all these animals are related, since most members of the weasel family, known as mustelids, have anal scent glands that produce a strong odor. Most species just use the glands to mark their territory, though.

But are there animals who spray like skunks but aren’t related to the skunk? Many animals have anal glands for marking territory, and if threatened some animals will empty the anal glands as a form as defense. The king ratsnake will sometimes do this, as will the lesser anteater, the opossum, and others.

But there’s another animal that actually sprays a smelly substance for defense, and it’s not one you’d expect. It’s a bird called the hoopoe, along with its relative the woodhoopoe.

The woodhoopoe lives in woods, savannah, and rainforests of Africa. It looks something like a cuckoo, with a very long tail marked with white spots. It’s mostly a metallic black in color, although some species have markings in other colors. Males have longer, more curved bills than females because they eat larger insects that live in bark and rotten wood while females eat smaller insects that live mostly on leaves. In this way, mated pairs don’t compete with each other for food.

The hoopoe lives across Eurasia and parts of Africa, and while it’s related to the woodhoopoe, it looks very different. It has a long crest that it can raise and lower like a crown, and it’s a pretty tan or brown color with black and white markings. Both males and females have long, slightly curved bills that they use to catch insects and other small animals.

Female hoopoes and woodhoopoes are picky about nesting spots. The female likes to nest in dead trees in rotting wood, or sometimes in a gap in a rock wall. The female incubates her eggs alone. But animals find dead trees and crumbling walls easy to climb, so to protect her nest the female can spray a foul-smelling liquid from the gland that most birds just use to secrete preening oil. This is the case for the female hoopoe and woodhoopoe too most of the time, but after she lays her eggs the gland becomes weaponized. Not only that, when the babies hatch, they develop the same gland. The female rubs the stinky oil on her babies and on the nest to deter predators, and researchers think it may also deter parasites. If an animal approaches the nest anyway, the female can spray the oil at it. And if the female is off catching food for her babies, the babies will hiss, peck, and squirt liquid poop at the predator. At that point, most predators probably just decide to go hunt something else. After they clean up.

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 138: City Animals

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This week we’re going to learn about some animals that have made their homes in cities alongside humans. Thanks to Corianne who suggested this amazing topic!

Further reading:

The BBC’s Urban Fox FAQ

Toronto vs. Raccoons

The urban fox has a favorite coffee shop and knows where to find parking downtown:

The urban raccoon’s apartment is really small but it’s in a great location:

The urban (rock) pigeon can walk to work in good weather:

Show transcript:

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

This week we’re going to look at animals that live in cities. This is a great suggestion by Corianne, who especially suggested the pigeon. But pigeons aren’t the only animals that live in cities alongside people. In fact, in 2018 a large-scale camera trap study of animals in Washington DC and Raleigh, NC concluded that just as many mammal species live in cities as live in the countryside. That’s only mammals, though. There aren’t as many species of other animals in cities.

Different animals hang out in cities in different parts of the world. In parts of Africa and Asia, local monkeys have moved into cities and cause mischief by stealing food from markets and tourists. Gulls are also thieves of food, sometimes getting so bold as to snatch a sandwich from a person’s hands while they’re eating it, even in cities nowhere near the ocean. City parks attract squirrels and deer, decorative fountains and ponds attract geese and ducks as well as alligators, peregrine falcons move in to feast on pigeons, rats, and other small animals, and some cities have to deal with the occasional bear or leopard, wild boars, even penguins. But today we’re going to focus on three really common city dwellers, both because they’re interesting and because there are so many misconceptions out there about them.

We’ll start with urban foxes. We talked about foxes in episode 106, but while urban foxes are plain old red foxes and not a separate species or subspecies, they’ve adapted to city life easily since they’re omnivores and agile animals that can climb obstacles like fences.

Many cities throughout the world have urban foxes, but they’re especially common in the UK. They eat out of trash cans for some of their diet, but they also hunt rats and other small animals that live in cities too, along with earthworms, insects, and even plants. They especially like fruit and acorns. When a fox finds some food, it will often run off with it and bury it somewhere, then come back later to eat it.

Because an urban fox doesn’t have to worry about predators as much as ordinary countryside foxes do, it can grow larger on average than its country cousins. But it’s also in more danger of being hit by cars or infected with diseases common to dogs and other canids, like mange and distemper.

Urban foxes have a bad reputation for biting, attacking pets, and in general being a nuisance. But the fox is just being a fox and doing the best it can. In many parts of the world, the red fox’s natural habitat is fragmented more every year as cities grow larger and farmland and woodland is turned into houses. Besides, foxes have been reported in cities for a long time—over a century in London, England, where foxes are relatively common. They especially like areas with parks, or where people have gardens or lawns.

The biggest problem with urban foxes is people who treat them like they’re dogs. They’re wild animals, so while it’s okay to leave food out for them, don’t try to touch one or get too close to it. Foxes who get too used to people can become aggressive. Foxes usually don’t bother animals as large as cats, either, and they avoid dogs, but don’t leave small pets like guinea pigs or rabbits outside, especially at night, because that is just asking for trouble.

The urban fox doesn’t always live only in the city, though. One fox, nicknamed Fleet, was tagged by researchers in 2014 and tracked to see where he spent his time. To their surprise, Fleet lived up to his name and traveled from the city of Hove into the countryside across England. In 21 days he traveled 195 miles, or 314 km, and probably went farther but his GPS tracker stopped working so we don’t know how far.

This is what a fox sounds like:

[fox sound]

In the UK, foxes are frequent city animals, but in North America it’s much more common for raccoons to fill the same ecological niche. The raccoon is native to North and Central America although it’s been introduced in parts of Europe as a fur animal and briefly to Japan as a pet. The raccoon makes a really bad pet, by the way. It’s not domesticated and will tear your house up.

The raccoon is mostly gray or gray-brown with some lighter areas of fur, black rings on its bushy tail, and black markings over its eyes. It grows a little over two feet long, or around 70 cm, not counting its tail. Its legs are relatively short and it scurries instead of really running, although it can swim well. The raccoon is a great climber and can even climb down trees headfirst by turning its hind feet so that they point backwards, which gives it a better grip. It has sharp claws too, and dexterous hands although they don’t have opposable thumbs. The raccoon’s front paws have as many sensory receptors as human hands, which means it can learn a lot by just touching something. Like, for instance, how to unlock a trash bin.

The raccoon is well-known for getting into trash no matter what kind of bin it’s in. This is because raccoons are remarkably intelligent. By now you probably know that intelligence and social complexity are linked, but raccoons have a much different society than other intelligent animals. Groups of related females generally occupy the same territory and come together to eat and rest, while males usually live in small groups that are mostly separate from females.

Like the fox, the raccoon is an omnivore. It eats insects and worms, fruit and nuts as well as other plant material, bird and reptile eggs, frogs, fish, crustaceans, and other small animals. Raccoons in captivity are known to wash their food by dipping it in water, but this behavior hasn’t actually been documented in wild raccoons. Some researchers think the raccoons aren’t actually trying to clean the food, but are mimicking the motion of catching food in water, while others suggest the raccoons are stimulating the nerve endings in their hands with water to learn more about the food they’re touching.

Raccoons prefer open forests near water, since they like to catch fish and frogs. But they will eat pretty much anything, which means they raid trash bins. For years, the city of Toronto in Canada had trouble with raccoons getting into people’s trash bins. The bins were designed to be picked up and emptied by city trucks, but the raccoons had learned to break the locks. In 2015 the city redesigned the bins to be raccoon resistant, and in 2016 after extensive testing the new bins were distributed to residents. Before long the raccoons had figured out how to open them.

Researchers think that the daily puzzles urban raccoons solve to find food actually make them smarter. Since they’re pretty smart to start with, that’s kind of scary.

Like urban foxes, urban raccoons can get too used to humans. They’re rarely dangerous to people or pets, but they can cause a real mess if they get into your house and will bite if they feel threatened.

This is what a raccoon sounds like:

[raccoon sound]

We’ll finish with the ubiquitous city bird, the pigeon. It’s properly called the rock pigeon or rock dove and is native to parts of Eurasia and Africa. But these days it’s spread throughout much of the world, especially in cities.

Most people are familiar with the pigeon. It’s usually gray or brownish-gray with a white patch on its rump and two broad stripes of black on its wings. Both males and females have iridescent feathers on the neck that shine green and purple in sunlight, but the iridescence in males is much more pronounced. Pigeons with other markings are either feral domesticated pigeons or have feral domesticated pigeons in their ancestry. The domesticated pigeon was actually developed from the rock pigeon and it’s probable that most city pigeons are actually mostly feral domesticated pigeons.

The pigeon is a fairly large bird, up to 15 inches long, or 37 cm, with a wingspan over two feet, or 72 cm. It mostly eats seeds and other plant material, but will also eat small insects. City pigeons will eat bread and other foods too, but they would be happier with whole grains. Like many other birds, the pigeon stores food in its crop after swallowing it, which allows it to eat more food than it would otherwise be able to hold. The crop is a chamber at the bottom of the esophagus.

Not only do pigeons have a crop, which not all birds have, pigeon parents produce a food called crop milk or pigeon milk that they feed to babies. It’s not milk at all, of course, but the nutrient-rich lining of the crop that it sheds and regurgitates to feed its babies, which are called squabs. Both parents produce crop milk, which sort of looks like cottage cheese. The babies can’t digest anything except crop milk for the first week of life, so the parents may actually not eat anything during the first days after the eggs hatch to make sure there aren’t any seeds mixed in with the crop milk. After a few days the parents mix in food that’s been softened in the crop.

Pigeons and doves are almost the only birds that produce crop milk. The flamingo and the male emperor penguin do too, even though they aren’t related to pigeons. But that’s it, as far as we know. So if anyone asks you what the flamingo, the emperor penguin, and the pigeon have in common, now you know. Also, they’re all birds.

Pigeons live in flocks, although the flock may break up into smaller groups or pairs during part of the day. At night the birds usually roost together except for pairs who have eggs or babies in a nest. Pigeons mate for life and both parents take care of the eggs and squabs. Flock leaders find food and lead the rest of the birds to it, whether the food comes from plants growing in a park or from a person scattering birdseed.

Pigeons are actually clean animals when they have access to water. They like to bathe and preen to keep their feathers clean. If you’ve ever watched a typical bird drink water, maybe at a puddle or a birdbath, you might have noticed that the bird dips some water into its beak, then tilts its head back so the water runs down its throat. This is because most birds can’t actually swallow water the way most mammals can. I mean, if you had to you could drink water while you were upside down, although you might choke or get it in your sinuses. But some of the water at least would get into your stomach. Birds couldn’t. Except for the pigeon, which can actually drink like a mammal, keeping its head down as it swallows. The pigeon and its close relatives are the only birds known who can do this.

No one thinks of pigeons as especially smart birds, but guess what. They’re actually pretty bright. Pigeons can easily memorize images, even hundreds of them, and retain those memories for years. They not only recognize individual humans, they can learn to understand what human expressions mean. They also have keen vision and can differentiate between very similar items or pictures, which leads to pigeons being trained to do something unexpected. Wait for it. You’re not going to believe this. Pigeons can learn to identify malignant breast tissue in mammograms at least as well as humans can. Researchers train birds to identify the differences in mammogram slides, then use four birds in a team. The team can be 99% accurate in identifying malignancies that need to be treated. So pigeons can save human lives!

Not only that, but researchers can find sources of lead pollution by taking blood samples from sick or dead pigeons found in cities. Since city pigeons generally have small territories that only encompass a few blocks, researchers can measure the level of lead found in birds and know roughly where the lead exposure occurred. That helps the city find and clean up sources of lead pollution.

Pigeons are actually quite healthy birds, despite their reputation as diseased. They’re surprisingly resistant to a lot of bird diseases, including bird flu. Many people think of pigeons as dirty scavengers, but like other urban animals, they’re just living out their lives in an environment humans made. And if they’re scavengers, just think about where that food is coming from. People are dropping it on the ground, that’s where. Maybe people are the dirty ones, throwing food around. Pigeons are just cleaning it up for us.

This is what a pigeon sounds like:

[pigeon sound]

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 135: Smallest of the Large

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This week we’re looking at some very small animals–but not animals that we think of as small. Join us for a horrendously cute episode!

Further reading:

The Echinoblog

Further listening:

Animals to the Max episode #75: The Sea Panda (vaquita)

Varmints! episode #49: Hippos

Further watching:

An adorable baby pygmy hippo

The Barbados threadsnake will protecc your fingertip:

Parvulastra will decorate your thumbnail:

Berthe’s mouse lemur will defend this twig:

The bumblebee bat will eat any bugs that come near your finger:

The vaquita, tiny critically endangered porpoise:

The long-tailed planigale is going to steal this ring and wear it as a belt:

He höwl:

A pygmy hippo and its mother will sample this grass:

This Virgin Islands dwarf gecko will spend this dime if it can just pick it up:

Show transcript:

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

I talk a lot about biggest animals on this podcast, so maybe it’s time to look at the very smallest animals. I don’t mean algae or bacteria or things like that, I mean the smallest species of animals that aren’t usually considered especially small.

We’ll start with the smolest snek, the Barbados threadsnake. It only lives on a few islands in the Caribbean, notably Barbados. The very largest individual ever measured was only 4.09 inches long, or 10.4 cm, but most are under four inches long. But it’s an extremely thin snake, not much thicker than a spaghetti noodle.

The Barbados threadsnake mostly eats termites and ant larvae. It spends most of its time in leaf litter or under rocks, hunting for food. The female only lays one single egg, but the baby is relatively large, about half the mother’s length when it hatches.

That’s so cute. Why are small things so cute?

Remember the starfish episode where we talked about the largest starfish? Well, what’s the smallest starfish? That would be Parvulastra parvivipara, which is smaller than a fingernail decoration sticker. It grows to about ten millimeters across and is orangey-yellow in color. It lives on the coast of Tasmania in rock pools between low and high tide, called intertidal rock pools.

If you remember the Mangrove killifish from a few episodes ago, you’ll remember how killifish females are hermaphrodites that produce both eggs and sperm, and usually self-fertilize their eggs to produce tiny clones of themselves. Well, Parvulastra does that too, although like the killifish it probably doesn’t always self-fertilize its eggs. But then it does something interesting for a starfish. Instead of releasing its eggs into the water to develop by themselves, Parvulastra keeps the eggs inside its body. And instead of the eggs hatching into larvae, they hatch into impossibly tiny miniature baby starfish, which the parent keeps inside its body until the baby is big enough to survive safely on its own.

But what do the baby starfish eat while they’re still inside the mother? Well, they eat their SIBLINGS. The larger babies eat the smaller ones, and eventually leave through one of the openings in the parent’s body wall, called gonopores. Researchers theorize that one of the reasons the babies leave the parent is to escape being eaten by its siblings. And yes, occasionally a baby grows so big that it won’t fit through the gonopores. So it just goes on living inside the parent.

Next, let’s look at the smallest primate. The primate order includes humans, apes, monkeys, and a lot of other animals, including lemurs. And the very smallest one is Berthe’s mouse lemur. Its body is only 3.6 inches long on average, or 9.2 cm, with a tail that more than doubles its length. Its fur is yellowish and brownish-red.

Berthe’s mouse lemur was only discovered in 1992. It lives in one tiny area of western Madagascar, where it lives in trees, which means it’s vulnerable to the deforestation going on all over Madagascar and is considered endangered.

It mostly eats insects, but also fruit, flowers, and small animals of various kinds. Its habitat overlaps with another small primate, the gray mouse lemur, but they avoid each other. Madagascar has 24 known mouse lemur species and they all seem to get along well by avoiding each other and eating slightly different diets. Researchers discover new species all the time, including three in 2016.

Last October we had an episode about bats, specifically macrobats that have wingspans as broad as eagles’. But the smallest bat is called the bumblebee bat. It’s also called Kitti’s hog-nosed bat, but bumblebee bat is way cuter. It’s a microbat that lives in western Thailand and southeast Myanmar, and like other microbats it uses echolocation to find and catch flying insects. Its body is only about an inch long, or maybe 30 millimeters, although it has a respectable wingspan of about 6 ½ inches, or 17 cm. It’s reddish-brown in color with a little pig-like snoot, and it only weighs two grams. That’s just a tad more than a single Pringle chip weighs.

Because the bumblebee bat is so rare and lives in such remote areas, we don’t know a whole lot about it. It was only discovered in 1974 and is increasingly endangered due to habitat loss, since it’s only been found in 35 caves in Thailand and 8 in Myanmar, and those are often disturbed by people entering them. The land around the caves is burned every year to clear brush for farming, which affects the bats too.

The bumblebee bat roosts in caves during the day and most of the night, only flying out at dawn and dusk to catch insects. It rarely flies more than about a kilometer from its cave, or a little over half a mile, but it does migrate from one cave to another seasonally. Females give birth to one tiny baby a year. Oh my gosh, tiny baby bats.

So what about whales and dolphins? You know, some of the biggest animals in Earth’s history? Well, the vaquita is a species of porpoise that lives in the Gulf of California, and it only grows about four and a half feet long, or 1.4 meters. Like other porpoises, it uses echolocation to navigate and catch its prey. It eats small fish, squid, crustaceans, and other small animals.

The vaquita is usually solitary and spends very little time at the surface of the water, so it’s hard to spot and not a lot is known about it. It mostly lives in shallow water and it especially likes lagoons with murky water, properly called turbid water, since it attracts more small animals.

Unfortunately, the vaquita is critically endangered, mostly because it often gets trapped in illegal gillnets and drowns. The gillnets are set to catch a different critically endangered animal, a fish called the totoaba. The totoaba is larger than the vaquita and is caught for its swim bladder, which is considered a delicacy in China and is exported on the black market. The vaquita’s total population may be no more than ten animals at this point, fifteen at the most, and the illegal gillnets are still drowning them, so it may be extinct within a few years. A captive breeding plan was tried in 2017, but porpoises don’t do well in captivity and the individuals the group caught all died. Hope isn’t lost, though, because vaquita females are still having healthy babies, and there are conservation groups patrolling the part of the Gulf of California where they live to remove gill nets and chase off fishing boats trying to set more of the nets.

If you want to learn a little more about the vaquita and how to help it, episode 75 of Corbin Maxey’s excellent podcast Animals to the Max is an interview with a vaquita expert. I’ll put a link in the show notes.

Next, let’s talk about an animal that is not in danger of extinction. Please! The long-tailed planigale is doing just fine, a common marsupial from Australia. So, if it’s a marsupial, it must be pretty big—like kangaroos and wallabies. Right? Nope, the long-tailed planigale is the size of a mouse, which it somewhat resembles. It even has a long tail that’s bare of fur. It grows to 2 ½ inches long not counting its tail, or 6.5 cm. It’s brown with longer hind legs than forelegs so it often sits up like a tiny squirrel. Its nose is pointed and it has little round mouse-like ears. But it has a weird skull.

The long-tailed planigale’s skull is flattened—in fact, it’s no more than 4 mm top to bottom. This helps it squeeze into cracks in the dry ground, where it hunts insects and other small animals, and hides from predators.

The pygmy hippopotamus is a real animal, which I did not know until recently. It grows about half the height of the common hippo and only weighs about a quarter as much. It’s just over three feet tall at the shoulder, or 100 cm. It’s black or brown in color and spends most of its time in shallow water, usually rivers. It’s sometimes seen resting in burrows along river banks, but no one’s sure if it digs these burrows or makes use of burrows dug by other animals. It comes out of the water at night to find food. Its nostrils and eyes are smaller than the common hippo’s.

Unlike the common hippo, the pygmy hippo lives in deep forests and as a result, mostly eats ferns, fruit, and various leaves. Common hippos eat more grass and water plants. The pygmy hippo seems to be less aggressive than the common hippo, but it also shares some behaviors with its larger cousins. For instance, the pooping thing. If you haven’t listened to the Varmints! Episode about hippos, you owe it to yourself to do so because it’s hilarious. I’ll put a link in the show notes to that one too. While the hippo poops, it wags its little tail really fast to spread the poop out across a larger distance.

Also like the common hippo, the pygmy hippo secretes a reddish substance that looks like blood. It’s actually called hipposudoric acid, which researchers thinks acts as a sunscreen and an antiseptic. Hippos have delicate skin with almost no hair, so its skin dries out and cracks when it’s out of water too long.

The pygmy hippo is endangered in the wild due to habitat loss and poaching, but fortunately it breeds successfully in zoos and lives a long time, up to about 55 years in captivity. For some reason females are much more likely to be born in captivity, so when a male baby is born it’s a big deal for the captive breeding program. I’ll put a link in the show notes to a video where you can watch a baby pygmy hippo named Sapo and his mother. He’s adorable.

Finally, let’s finish where we started, with another reptile. The smallest lizard is a gecko, although there are a lot of small geckos out there and it’s a toss-up which one is actually smallest on average. Let’s go with the Virgin Islands dwarf gecko, which lives on three of the British Virgin Islands. It’s closely related to the other contender for smallest reptile, the dwarf sphaero from Puerto Rico, which is a nearby island, but while that gecko is just a shade shorter on average, it’s much heavier.

The Virgin Islands dwarf gecko is only 18 mm long not counting its tail, and it weighs .15 grams. A paperclip weighs more than this gecko. It’s brown with darker speckles and a yellow stripe behind the eyes. Females are usually slightly larger than males. Like other geckos, it can lose its tail once and regrow a little stump of a tail.

The Virgin Islands dwarf gecko lives in dry forests and especially likes rocky hills, where it spends a lot of its time hunting for tiny animals under rocks. We don’t know a whole lot about it, but it does seem to be rare and only lives in a few places, so it’s considered endangered. In 2011 some rich guy decided he was going to release a bunch of lemurs from Madagascar onto Moskito Island, one of the islands where the dwarf gecko lives. Every conservationist ever told him oh NO you don’t, rich man, what is your problem? Those lemurs will destroy the island’s delicate ecosystem, drive the dwarf gecko and many other species to extinction, and then die because the habitat is all wrong for lemurs. So Mr. Rich Man said fine, whatever, I’ll take my lemurs and go home. And he did, and the dwarf gecko was saved.

Look, if you have so much money that you’re making plans to move lemurs halfway across the world because you think it’s a good idea, I can help take some of that money off your hands.

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 134: The Magpie

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Thanks to Emma for this week’s suggestion about the magpie! We’ll learn all about the magpie and also about the mirror test for intelligence and self-awareness.

The black-billed magpie of North America (left) is almost identical in appearance to the Eurasian magpie (right):

Not all magpies are black and white. This green magpie is embarrassed by its goth cousins:

The beautiful and altruistic azure-winged magpie:

Chimps pass the mirror test. So do magpies:

The Australian magpie, or as Emma calls it, MURDERBIRD:

Show transcript:

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

This week let’s learn about the magpie, a frighteningly intelligent bird. Thanks to Emma for the suggestion!

The magpie is a member of the corvid family, so it’s related to crows, ravens, jackdaws, jays, rooks, and a few other kinds of birds. Most magpies are native to Europe and Asia, but there are a couple of species found in western North America. There are also two species found in Australia, but we’ll come back to those later on. People think of magpies as black and white, but some Asian species are green or blue. They look like parrots at first glance.

The most well-known magpie is the Eurasian or common magpie. Its body and shoulders are bright white and its head, tail, wings, beak, and legs are a glossy black. It has a very long tail for its size, a little longer than its body, and its wingspan is about two feet across, or 62 cm. It looks so much like the black-billed magpie of western North America that for a long time people thought the two birds were the same species.

Like most corvid species, the magpie is omnivorous. It will eat plant material like acorns and seeds, insects and other invertebrates, the eggs and babies of other birds, and roadkill and other carrion. It will also hunt small animals in groups. It mates for life and is intensely social.

The big thing about the magpie is how intelligent it is. It’s a social bird with a complex society, tool use, excellent memory, and evidence of emotions usually only attributed to mammals, like grief. An experiment with a group of Azure-winged magpies, a species that lives in Asia, shows something called prosocial behavior, which is incredibly rare except in humans and some other primates. Prosocial behavior is also called altruism. In the experiment, a magpie could operate a seesaw to deliver food to other members of its flock, but it wouldn’t get any food itself. All the magpies tested in this way made sure their bird buddies got the food. When access to the food was blocked for the other birds, the bird operating the seesaw didn’t operate it.

The magpie also passes what’s called the mirror test. The mirror test is when a researcher temporary places a colored dot on an animal’s body in a place where it can’t see it, usually the face. Then a mirror is introduced into the animal’s enclosure. If an animal sees the dot in the reflection and investigates its own body to try to examine or remove the dot, the researcher concludes that the animal understands that the reflection is itself, not another animal.

This sounds simple because most humans pass the mirror test when we’re still just toddlers. But most animals don’t. Obviously researchers haven’t been able to try the test with every single animal in the world, but even so, the results they’ve found have been surprising. Great apes pass the test, bottlenose dolphins and orcas have passed, and the European magpie has passed the test. Cleaner wrasse fish also passed the test.

You know what else passed the mirror test? Ants.

The mirror test is supposed to be a test of self-awareness, but that’s not necessarily what it’s showing. Dogs fail the mirror test but pass other tests that more clearly indicate self-awareness. But in dogs, the sense of smell is much more important than sight. Humans don’t even usually think of smell since we’re more attuned to sight and hearing, so we’ve constructed a flawed test without realizing it.

Gorillas also don’t always pass the mirror test, but researchers think this may be because in gorilla society, it’s an act of aggression to look into another gorilla’s eyes. So the gorilla looking in the mirror may literally not see the dot that was painted on its forehead while it was asleep, since it automatically avoids looking at another gorilla’s face, even its own reflection. As far as I can find, no one has tried painting the dot on bottom of the gorilla’s foot or something instead of its face.

Parrots, monkeys, lesser apes, and octopuses don’t pass the test, but all these animals express intelligence in many other ways. Not only that, but some animals that don’t technically pass the test because they don’t give any attention to the dot painted on them will use the mirror for other purposes, like looking at parts of the body they can’t ordinarily see. Asian elephants do poorly on the mirror test, but do well in other tests that measure self-awareness.

Also, most of the animals given the mirror test have never looked in a mirror before. Maybe they don’t realize that dot wasn’t always on their cheek. Or maybe they just don’t care if they’ve got a dot on their face.

That brings us to a final criticism of the mirror test. Some animals live in environments where they’re likely to see reflections. An animal that frequently sees its own reflection in still water when it drinks is more likely to understand that this is a reflection of itself. An animal that has never seen its own reflection won’t necessarily understand what it is. Even humans have this trouble. People who have been blind since birth but who regain vision later in life often don’t know what a reflection is at first. This doesn’t mean they’re stupid or not self-aware, it’s just something new that they have to learn.

But it’s still interesting that magpies pass the mirror test. Okay, let’s move on.

There are a lot of folklore traditions and superstitions about magpies. In Britain, seeing a single magpie is sometimes said to be bad luck, a sign of bad weather to come, or even an omen of death. Seeing two magpies is good luck or a good omen. In parts of Asia all magpies are considered lucky. The nursery rhyme “one for sorrow, two for joy” is originally about magpies, although as a kid I learned it about crows since I live in a part of the world where we don’t have magpies. The rhyme varies, but the version I learned is “one for sorrow, two for joy, three for a girl, four for a boy, five for silver, six for gold, and seven’s a secret that’s never been told.”

Magpies are supposed to be attracted to shiny objects and are thought of as thieves. There’s a whole opera about this, Rossini’s La Gazza Ladra, about a girl who’s accused of stealing a silver spoon. The girl is convicted and condemned to death, but just in time the spoon is discovered in a magpie’s nest and the girl is pardoned. You’ve probably heard the overture to this opera without knowing it, since it appears in a lot of movies.

But do magpies really steal shiny things like jewelry, coins, and silver spoons? Results of a study of wild common magpies indicate that they don’t. A few of the magpies investigated the shiny objects, but none took any and most birds were wary of getting too close to items they’d never seen before.

Many people think magpies are pests who chase off or kill other songbirds, steal things, and are basically taking over the world. That’s actually not the case. The magpie is an important part of its ecosystem, and areas with plenty of magpies actually have healthier populations of other songbirds. The black-billed magpie of North America will hang around herds of cattle, cleaning the animals of ticks and other insects.

Let’s return now to the Australian magpies I mentioned earlier. The black magpie is mostly black with white on its wings. It’s actually not closely related to the magpie at all but is a species of treepie. Other treepies are found in southeast Asia. Treepies are corvids, but they’re not closely related to magpies although they look similar.

The Australian magpie also looks similar to the common magpie, but it’s not a corvid, although its family is distantly related to the corvid family. It’s mostly black with white markings and a heavy silvery-white bill with a black tip. It lives in Australia, southern New Guinea, and has been introduced to New Zealand, where it’s an invasive pest that displaces native birds. It’s about the size of the common magpie, but more heavily built with a shorter tail. It mostly eats insects and other invertebrates, but it is omnivorous. Researchers have noticed that some Australian magpies dunk insects in water before eating them, a practice seen in many species of birds. It doesn’t just dip the insect in the water, though, it thrashes it around. Researchers theorize that this helps rid certain insects of toxins and therefore improves the taste.

If someone gets too close to an Australian magpie’s nest, it will divebomb them, especially the male. It may also peck at the face, sometimes causing injuries. Sometimes people will paint eyes on the back of a hat to try and fool a magpie into attacking the painted face instead of their actual face, although this generally doesn’t work. The magpie especially attacks people who are moving fast, like joggers and bicyclists, so some bike helmets have spikes on them to stop magpies from diving at them. But since a magpie will also sometimes land on the ground in front of a person, then fly up and attack their face from that angle, it doesn’t really matter what kind of hat you wear. It’s probably safest to avoid magpies who are nesting. The babies will be grown and flown away soon enough and then you can have your public park back.

Australian magpies also chase off predatory birds, mobbing them the same way crows and other birds mob hawks.

The Australian magpie is also an intelligent bird. Researchers think intelligence in birds and animals of all kinds is linked to sociability, and Australian magpies are just as social as their far-distant Eurasian and North American cousins. Magpies who grow up in larger groups score higher on tests of intelligence than magpies from smaller groups. The larger a group, the more complex the social interactions required of an individual bird, which drives cognitive development.

The Australian magpie has an amazing singing voice and can mimic other birds and animals. It even sometimes imitates human speech. A magpie may sing constantly for over an hour at a time, and pairs often call together. These duets actually indicate to other birds that the pair is working together to defend their territory, so maybe if you hear it it’s time to put on the bike helmet with spikes.

This is what an Australian magpie sounds like:

[magpie call]

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!