Episode 464: Farmyard Animals

Thanks to Emily, Jo, and Alexandra for their suggestions this week!

Further reading:

Highland Cattle Society

Mongolian Sheep

The Donkey Sanctuary

The Highland cow is so cute (picture taken from the first site linked above):

Some fat-tailed sheep (picture taken from the sheep article linked above):

Donkeys:

A happy donkey and a happy person (photo taken from the Donkey Sanctuary’s site, linked above):

Show transcript:

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

After last week’s giant fish episode, this week we’re going to have a shorter episode of animals you’ve probably seen, especially if you live in the countryside. But first, I forgot to credit two people from last week’s episode, Dylan and Emily, who both wanted to hear about mudskippers along with Arthur! I had so many names I missed some.

This week we’ll talk about some domestic mammals, suggested by Alexandra, Jo, and Emily. Let’s start with Emily’s suggestion, the Highland cow.

Cows are classified in the family Bovidae, which includes not just the domestic cow and its relations but goats, sheep, antelopes, and many other animals with cloven hooves who chew the cud as part of the digestive process–but not deer or giraffes, and not the pronghorn even though people call it an antelope. It is confusing. Many bovids have horns, usually only two but sometimes four or even six, and those horns are never branched. Sometimes only the male has horns, sometimes both the male and female. Bovids don’t have incisors in the front of the upper jaw, only in the lower jaw. Instead, a bovid has a tough dental pad that helps it grab plants.

The Highland cow is a breed of domestic cow that originated in Scotland, although it’s now popular in many other places too. It’s a tough animal with a long outer coat of fur and a short, fuzzy undercoat that helps it survive harsh winters. Most are reddish-brown, but some are black, silvery-white, dun, or other shades. It has long, wide horns and its long fur usually falls over its face, which protects its eyes and also looks incredibly cute.

Not only can the Highland cow thrive on pasture that’s considered poor, meaning the plants aren’t as nutritious, it’s also disease resistant, even-tempered, and intelligent. It’s a compact, relatively small cow, but it’s not a miniature cow. Like, you can’t pick it up like a dog, although you could probably hug one if the farmer says it’s okay. A bull can stand about 5 feet tall at the shoulder, or 1.5 meters, while cows are smaller overall.

The Highland cow is raised for its meat, which is naturally lean and delicious. But because they also happen to be small for cows, and so even-tempered, and so cute, many small farms and petting zoos keep a few just as pets. Since the Highland cow likes eating plants that other cow breeds won’t touch, it’s also helpful for clearing overgrown land.

Next, Alexandra wanted to learn more about the fat-tailed sheep, another bovid. The sheep is one of the oldest domesticated animals in the world, with some experts estimating that it was first domesticated at least 11,000 years ago and possibly over 13,000 years ago, around Asia and the Middle East. Sheep are especially useful to humans because not only can you eat them, they produce wool.

Wool has incredible insulating properties, as you’ll know if you’ve ever worn a wool sweater in the snow. Even if it gets wet, you stay nice and warm. Even better, you don’t have to kill the sheep to get the wool. The sheep just gets a haircut every year to cut its wool short. Wild sheep don’t grow a lot of wool, though. They mostly have hair like goats. Humans didn’t start selecting for domestic sheep that produced wool until around 8,000 years ago.

The fat-tailed sheep isn’t a single breed but a type of sheep, most common in central Asia, northern Africa, and the Middle East. It’s adapted for life in arid conditions, where there isn’t a lot of water. The fat deposits on both sides of the tail act like a camel’s hump, allowing the animal to absorb the stored fat if it can’t find enough food and water.

The fat-tailed sheep can have a really huge tail, so big it can make up almost a third of its body weight. Because the fat mostly collects on either side of the tail bones, the tail’s shape has two lobes, which makes the sheep look like it has an extra butt on its butt. In some breeds, the tail gets wider as the fat deposits grow, while in other breeds, the tail just gets longer, sometimes so long it actually brushes the ground.

The tail fat helps the sheep, but it’s also considered a delicacy to people. Wherever the fat-tailed sheep is raised, there are special recipes to cook the tail. Many breeds of fat-tailed sheep also produce long, coarse wool that’s used to make carpets and felt.

We’ll finish with Jo’s suggestion, the domestic donkey. Donkeys are equids, and instead of cloven hooves like bovids, they have solid hooves. They’re closely related to horses and zebras, and more distantly related to rhinoceroses and tapirs.

The domestic donkey is descended from the African wild ass. Researchers estimate it was domesticated around five to seven thousand years ago by the ancient nomadic peoples of Nubia in Africa, and quickly spread throughout the Middle East and into southern Asia and Europe.

The domestic donkey is a strong, sturdy animal that’s usually fairly small. One of the biggest breeds is the American Mammoth Jackstock, and another is the French Baudet du Poitou, which has long fur. Both breeds can be as big as a horse. Big donkey breeds like these were mostly developed to cross with horses, to produce even larger, stronger mules. Mules are hybrid animals and are infertile, but they’re very strong.

The donkey is usually gray or brown and has long ears. Most have a darker stripe down the spine, called an eel stripe, and another stripe across the shoulders. Many have a lighter-colored nose, belly, and legs. The donkey’s mane is short and stands upright.

The donkey’s small size and big strength has made it a popular working animal throughout the world. It can carry loads, can be ridden, and can pull carts and plows. It’s famously tough and can be stubborn if it doesn’t feel like it’s being treated well, and it can even be dangerous when it kicks and bites. Sometimes farmers keep donkeys with their sheep or other animals, because the donkey will look out for danger and warn the herd by braying if it sees a predator. If the predator gets too close, the donkey will attack it instead of running away.

In many places in the world, the donkey is an important work animal even today. Not everyone is lucky enough to afford a tractor or truck, so donkeys do the same work for people that they’ve done for thousands of years. The problem is that when a donkey gets old or is injured, and can’t work anymore, sometimes they’re killed for meat or just abandoned. Luckily there are donkey rescues who do their best to help as many donkeys as they can, especially the Donkey Sanctuary.

The Donkey Sanctuary started in England in 1969, but it now has sanctuaries throughout Europe, and it runs programs that offer free veterinary care and education about donkeys for people in many parts of the world. One important thing the Donkey Sanctuary does, and other donkey rescues do too, is give a home to elderly donkeys who can’t work anymore. It’s only fair that a hard-working donkey gets to retire and have a peaceful old age.

You can find Strange Animals Podcast at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, corrections, or suggestions, email us at strangeanimalspodcast@gmail.com.

Thanks for listening!

Episode 463: The Big Fish Episode

It’s an episode just absolutely full of fish! Thanks to Arthur, Yuzu, Jayson, Kabir, Nora, Siya, Joel, Elizabeth, Mac, Ryder, Alyx, Dean, and Riley for their suggestions this week!

Further reading:

Study uncovers mechanics of machete-like ‘tail-whipping’ in thresher sharks

Business end of a sawfish:

Giant freshwater stingray!

The frilled shark looks like an eel:

The frilled shark’s teeth:

The thresher shark and its whip-like tail [photo by Thomas Alexander – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=50280277]:

The Halmahera epaulette shark, looking a little bit like a long skinny koi fish [photo by Mark Erdmann, California Academy of Sciences, Attribution, https://commons.wikimedia.org/w/index.php?curid=30260864]:

A mudskipper, which is a fish even though it kind of looks like a weird frog [photo by Heinonlein – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44502355]:

The red-lipped batfish wants a big kiss:

The male blue groper is very blue [photo by Andrew Harvey, some rights reserved (CC BY) – https://www.inaturalist.org/photos/62196538, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=157789928]:

The giant oarfish is very long:

Show transcript:

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

This week we have a big fish episode! I mean, it’s a big episode about a lot of different fish, not necessarily fish that are big—although some of them sure are! Thanks to Arthur, Yuzu, Jayson, Kabir, Nora, Siya, Joel, Elizabeth, Mac, Ryder, Alyx, Dean, and Riley. I told you this is a big fish episode.

Let’s jump right in with a fish suggested by Jayson, the sawfish. There are five species of sawfish alive today. The smallest can still grow over 10 feet long, or 3 meters, while the biggest species can grow over 20 feet long, or 6 meters. The largest sawfish ever reliably measured was 24 feet long, or 7.3 meters.

The sawfish lives mostly in warm, shallow ocean waters, usually where the bottom is muddy or sandy. It can also tolerate brackish and even freshwater, and will sometimes swim into rivers and live there just fine.

The sawfish is a type of ray, and rays are most closely related to sharks. Like sharks, rays have an internal skeleton made of cartilage instead of bone, but they also have bony teeth. You can definitely see the similarity between sharks and sawfish in the body shape, although the sawfish is flattened underneath, which allows it to lie on the ocean floor. There’s also another detail that helps you tell a sawfish from most sharks: the rostrum, or snout. It’s surprisingly long and studded with teeth on both sides, which makes it look like a saw.

The teeth on the sawfish’s saw are actual teeth. They’re called rostral teeth and the rostrum itself is part of the skull, not a beak or a mouth. It’s covered in skin just like the rest of the body. The sawfish’s mouth is located underneath the body quite a bit back from the rostrum’s base, and the mouth contains a lot of ordinary teeth that aren’t very sharp.

Since the sawfish has plenty of teeth in its mouth, you may be wondering how and why it also has extra teeth on both sides of its saw. It’s because the rostral teeth evolved from dermal denticles.

Dermal denticles look like scales but they’re literally teeth, they’re just not used for eating. Sharks have them too, along with some other fish. In the case of the sawfish, the rostral teeth grow much larger than an ordinary dermal denticle, and stick out sideways.

Both the rostrum and the head are packed with electroreceptors that allow the sawfish to sense tiny electrical charges that animals emit as they move. This might mean a school of fish swimming through muddy water, or it might mean a crustacean hiding in the sand. The sawfish sometimes uses its rostrum to dig prey out of the sand, but it also uses it to slash at fish or other animals. Then the sawfish can either grab the injured or dead animal with its mouth or pin it to the sea floor with its rostrum to maneuver it into its mouth. Its mouth is relatively small and it prefers to swallow its food whole, head-first, so it can only eat fish that are smaller than its mouth. That’s also why it doesn’t want to eat people. Its mouth is too small.

Yuzu wanted to learn about another shark relation, the giant freshwater stingray, which lives in rivers in southeast Asia. It’s dark gray-brown on its back and white underneath, and it has a little pointy nose at the front of its disc. It also has dermal denticles on its back.

The giant freshwater stingray has a rounded, flattened body, and it’s really big. A big female can grow over 7 feet across, or 2.2 meters. Its tail is long and thin with the largest spine of any stingray known, up to 15 inches long, or 38 cm. Its tail is so long that if you measure the giant freshwater stingray by length including its tail, instead of by width of its disc, it can be as much as 16 feet long, or about 5 meters. Some researchers think there might be individuals out there much larger than any ever measured, possibly up to 16 feet wide. The length and thinness of the tail gives the ray its other common name, the giant freshwater whipray, because its tail looks like a whip.

While we’re talking about shark relations, let’s go ahead and talk about a few actual sharks. Kabir wanted to learn about the frilled shark, which looks and acts more like an eel than a shark. A big female can grow up to 6 and a half feet long, or 2 meters. Males are a little shorter on average. The frilled shark has the same anatomy found in ancient sharks from the fossil record, dating back at least 95 million years. It’s found a body type that works for it.

The frilled shark lives on the continental shelf in many parts of the world, and while it technically lives near the sea floor, at night it migrates closer to the ocean surface to find fish, squid and other cephalopods, and other food. There are two species known, with the southern African frilled shark only discovered in 2009.

The frilled shark is dark brown or gray, and its jaws are long and contain clusters of teeth in little rows. Each tooth has three sharp points, and there are 300 teeth, so a frilled shark has 900 points in its mouth. The points are so sharp that scientists examining dead sharks have gotten cut on the teeth, which would be really embarrassing if you’re a shark expert that was bitten by a dead shark. The frilled shark can open its jaws extremely wide to swallow fish and other animals that are up to about half the size of the shark itself. It even eats other sharks.

Next, Joel wanted to learn about the thresher shark. It’s a truly big fish that can grow up to 20 feet long, or over 6 meters. It’s a fast, slender shark with a tail fin that can be as long as its body. It eats a lot of other animals, including birds and crustaceans, but it specializes in hunting fish that travel in schools, like tuna, sardines, and mackerel. It uses its incredibly long tail as a whip, slapping a fish to stun it so the shark can eat it. When it whips its tail, its body flexes so that its head points downward in the water with the tail snapping forward over it. A 2024 study determined that the thresher shark’s vertebral column is fortified to allow it to work like a catapult. The thresher shark can also use its long tail to help it leap out of the water completely, although scientists don’t know why it wants to do that.

There are three species of thresher shark known to science, but in 1995 a genetic analysis revealed the possible presence of a fourth species. Scientists think it lives in the eastern Pacific and may look similar to the bigeye thresher, enough that it gets misidentified as that species when it’s seen. The three known species of thresher shark are hard to tell apart at a distance as it is.

And for our last shark, Siya asked about the Halmahera epaulette shark. It’s light brown with darker and lighter spots, and is a slender shark that can grow a little over 2 feet long, or 68 cm. It lives around Indonesia, and it might live in other places too. We don’t know yet, because it was only discovered in 2013 and only two specimens have ever been found.

Epaulette sharks are also called walking sharks, because they use their fins to walk along the sea floor and explore crevices in rocks. Some species can even walk short distances on land to enter tidal pools and other places where they can find food. They live in warm, shallow water, usually near reefs or islands, and they eat whatever small animals they can find. There are nine species known, but there are undoubtedly more than haven’t yet been discovered by science. You might think this is strange for a shark that can walk on land, but walking sharks are nocturnal and not very big, so it’s easy to miss them when they’re out and about.

That brings us to Arthur’s suggestion, the mudskipper. The mudskipper also uses its fins to walk. Its pectoral fins are muscular and allow it to climb out of the water and onto land, climb into low branches, and even jump. Its pectoral fins look like little arms, complete with an elbow. The elbow is actually a joint between the actual fins and the radial bones, which in most fish are hidden within the body but which stick out of the mudskipper’s sides a short distance. This helps it move around on land more easily. Its pelvic fins are also shaped in such a way that they act as little suction cups on land.

The mudskipper is so good at living on land that it’s actually considered semi-aquatic. It lives in mudflats, mangrove swamps, the mouths of rivers where they empty into the ocean, and along the coast, although it prefers water that’s less salty than the ocean but more salty than ordinary freshwater. It only lives in tropical and subtropical areas because it needs high humidity to absorb oxygen through its skin and the lining of its mouth and throat.

The mudskipper is a fish, but it looks an awful lot like a frog in some ways, due to convergent evolution. It has a wide mouth and froglike eyes at the top of its head and will often float just under the water with its eyes above water, looking for insects it can catch. The largest species grows about a foot long, or 30 cm, and while it has some scales, its body is coated with a layer of mucus to help it retain moisture. It spends most of the day on land, hunting for insects and other small animals. Not only can it absorb oxygen through its skin, it keeps water in its gill chambers to keep the gills wet too. It even has a little dimple under its eye that holds water, that helps keep its eyes moist.

The mudskipper also takes a big mouthful of water with it when it climbs on land, but not to breathe. It uses the water to hunt with. When it encounters an insect or other small animal on land, it carefully rotates its mouth–yes, it can rotate its mouth, which has led to me trying to rotate my mouth, something humans can’t actually do–so that its mouth is just above the animal. Then it spits out the mouthful of water onto the insect and immediately sucks the water back into its mouth, carrying the insect with it. When it catches an animal underwater, it opens its big mouth quickly, causing suction that sucks the animal right into its mouth. It also has sharp teeth, so when an animal is in its mouth, it’s not getting out again.

Alyx, Dean, and Riley suggested we talk about the red-lipped batfish, a type of anglerfish only found around the Galapagos Islands in the Pacific Ocean. It lives on the ocean floor where the water is fairly shallow, and it grows about 8 inches long, or 20 cm. It’s usually a mottled brown, green, or grey with a white stomach, but its mouth is bright red. It looks like it’s wearing lipstick. It eats fish and other small animals, which it attracts using a lure on its head, a highly modified dorsal fin called an illicium.

The weirdest thing about the red-lipped batfish is actually its fins. It prefers to walk on the bottom of the ocean instead of swim, and it has modified pectoral fins called pseudolegs. The pseudolegs make it look a little bit like a weird frog with lipstick. Researchers think the red lips may be a way to attract potential mates, presumably ones who are hoping for a big smooch. At this rate I’m wondering if there are any fish that don’t walk on their fins.

Next, Mac wanted to learn about a fish called the payara. The problem is, there are two fish with that name, so let’s learn about them both!

The first payara is a pretty, silvery fish with a couple of small dark spots on its body. It’s found in the Amazon basin in South America and can grow at least 1 foot 8 inches long, or 51 cm. It’s sometimes kept in large aquariums, and is sometimes called the vampire tetra or the vampire fish because it has a pair of long fangs that it uses to stab other fish with before eating them. Its fangs stick up from its lower jaw, though, so if it’s a vampire fish, it’s an upside-down vampire.

As for the other payara, it’s related to the first kind and is also found in South America, but it’s even larger. It can grow a little over 3 feet long, or 3.3 meters. Its teeth are also large and sharp, including two big fangs sticking up from its lower jaw. In a big individual, its fangs may be 4 inches long, or 10 cm. This is not a fish you want to get bitten by! You are probably not in any danger of being bitten by this payara, though, unless you happen to spend a lot of your time swimming along the bottom of rivers in the Amazon.

Quite a while ago, Ryder suggested we learn about the pipe cichlid. I tried to find more about it and I think it’s actually a fish called the pike cichlid. Pike cichlids are popular freshwater aquarium fish that are native to tropical and subtropical parts of eastern South America, and there are about 45 species known so far. They’re typically quite small, with most species only growing a few inches long, or around 8 cm, although some species are more than twice that length. The pike part of their name comes from their shape, like a teeny-tiny pike, a predatory fish that can grow up to 5 feet long, or 1.5 meters. Pike and pike cichlids aren’t related, but pike cichlids are predatory. It’s just that instead of eating other fish, ducks, frogs, and even reptiles and mammals that end up in the water, the pike cichlid mostly eats insects.

Elizabeth wanted to learn about the blue groper, a fish found around Australia and nowhere else in the world. It lives around reefs and rocky areas near the coast, where it can find plenty of starfish, urchins, crustaceans, and other small animals to eat. It can grow almost six feet long, or 1.75 meters, and its teeth are peg-shaped to help it pick mollusks and other animals off of rocks before crushing them.

It’s called the blue groper because males are a beautiful blue color, while females are brown or reddish-brown and young fish are green. All young blue gropers are female, and as they grow up some change to become males while most remain females. The fish grow very slowly and can live to be at least 70 years old, so the fish don’t even reach maturity until they’re 15 or 20 years old. When a fish is around 30 or 35 years old, it will change gender again, this time becoming a male. But if the male of a group dies, the group’s dominant female will change into a male and turn blue. This is common in the family of fish that the blue groper belongs to, Labridae, also called wrasses.

Let’s finish with a suggestion from Nora, the oarfish. The giant oarfish and Russell’s oarfish can both grow at least 26 feet long, or 8 meters, and possibly much longer. Most of its length is tail, which often shows damage from being bitten. Since its organs are all close to the front of its body, and it doesn’t need its tail for swimming, if a predator takes a bite out of its tail, the fish is going to be fine. The oarfish can even detach pieces of its tail if it needs to, the same way some lizards can, to distract a potential predator. Like those lizards, the tail doesn’t grow back.

The oarfish is silvery in color with a red crest on its head and a mane-like fin down its back, although it’s actually an elongated dorsal fin. It has extremely long pelvic fins too.

The giant oarfish has a short, blunt snout and no teeth because it filters krill and other tiny animals from the water. It doesn’t have scales. Instead, its skin is soft with a delicate layer called ganoine that gives it a shimmery, almost metallic appearance. The long filaments of the crest on its head and its pelvic fins are also delicate. But although it’s long and slender like an eel, it actually swims vertically with its head pointing up and its tail down. We’re not sure why, although one theory is that this minimizes its profile to predators looking up from below. It can swim quickly straight up and down to avoid predators that mostly just swim forward.

We know so little about the oarfish, and what we know is so strange, that it’s the next best thing to a sea serpent. The first living giant oarfish was only filmed in 2001. Most oarfish are only seen when they’re dead or dying. It seems to live throughout the world’s oceans, except for the Arctic and Antarctic, and is a deep-sea fish but may migrate closer to the surface at night to find more food.

A Japanese legend says the oarfish predicts earthquakes. If an oarfish is seen near the surface or washes up on a beach, an earthquake is supposed to be imminent. That seems to be a coincidence, though.

The oarfish looks like a sea serpent, and some people think it might have given rise to some sea serpent sightings. This may or may not be the case, but it’s certainly a mysterious fish.

You can find Strange Animals Podcast at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, corrections, or suggestions, email us at strangeanimalspodcast@gmail.com.

Thanks for listening!

Episode 462: Cryptic Coloration

Thanks to Måns, Sam, Owen and Askel for this week’s suggestions!

Further reading:

Shingleback Lizard

What controls the colour of the common mānuka stick insect?

The mossy leaf-tailed gecko has skin flaps that hide its shadow. There’s a lizard in this photo, I swear! [photo by Charles J. Sharp – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=92125100]:

A shingleback lizard, pretending it has two heads:

The beautiful wood nymph is a beautiful moth but also it looks like a bird poop:

The Indian stick insect (photo by Ryan K Perry, found on this page):

The buff tip moth mimics a broken-off stick. This person has a whole handful of them:

A cuttlefish can change colors quickly [photo by Σ64 – Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=77733806]:

Show transcript:

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

This week we’re going to talk about a few types of camouflage, a suggestion by Måns, and we’ll also talk about some camouflaged animals suggested by Sam, Owen and Aksel, Dylan, and Nina.

There are lots of types of camouflage, not all of it visual in nature. Back in episode 191 we talked about some toxic moths that generate high-pitched clicks that bats hear, recognize, and avoid. Naturally, some non-toxic moths also generate the same sounds to mimic the toxic moths.

Måns specifically suggested cryptic coloration, also called crypsis. It’s a type of camouflage that allows an animal to blend into their surroundings, which can involve multiple methods.

Some animals have cryptic coloration mainly along the edges of the body, to defeat a skill many predators use called edge detection. A lot of amphibians and reptiles have patches surrounded by an outline, with dark patches having a darker outline and light patches having a lighter outline. This acts as disruptive camouflage, hiding the outline of an animal’s body as it moves around. Some animals take this camouflage even further, with a way to hide their own shadow.

This is the case with the mossy leaf-tailed gecko, which is native to the forests of eastern Madagascar. It can grow up to 8 inches long, or 20 cm, not counting its tail, and it’s nocturnal. Its tail is flat and broad, sort of shaped like a leaf, but it doesn’t disguise itself as a leaf.

The mossy leaf-tailed gecko has a complicated gray and brown pattern that looks like tree bark, and it can change its coloration a little bit to help it blend in even more. At night it’s well hidden in tree branches as it climbs around looking for insects, but in the day it needs to hide really well to avoid becoming some other animal’s snack while it’s sleeping.

It does this by finding a comfortable branch and flattening its body and tail against it so that it just looks like another part of the branch. But to make it even more hidden, it has a flap of skin along its sides that wraps even farther around the branch. Not only do these skin flaps hide its edges, it hides its shadow, since the flaps are really flat and there’s no curved edge of a lizard belly pressed against a branch that a predator might notice.

The most common kind of cryptic coloration is called countershading, and it’s so common that you might not even have noticed it although you see it almost every time you see a fish, amphibian, reptile, and many birds and mammals. Countershading is an animal that’s darker on top and lighter underneath, like a brown mouse with a white belly. It’s even found in some insects and other invertebrates.

Countershading is another way to hide a shadow. If a dolphin, for instance, was gray all over, its underside would look darker because of shadows, since sunlight shines down from the sky and makes shadows underneath the body. That would make its body shape look rounder, meaning it stands out more and a predator would notice it more easily. But most dolphins are pale gray or even white underneath. There’s still a shadow, but it’s no longer darker than the rest of the body. The lighter colored underside makes the shadow paler, and as a result, from a distance the dolphin looks almost the same shade all over, which makes it appear flat and the edges of its body harder to see. We even know that some dinosaurs were countershaded, with lighter colored bellies.

Countershading is so common in animals that it’s almost impossible to pick one example. Dylan suggested we learn about the shingleback lizard, an amazing animal found in many parts of Australia. It’s also called the stumpy-tailed lizard, the bobtail lizard, or the two-headed lizard. All three of those names refer to the animal’s tail, which is short and fat and actually looks like a second head. This is an example of automimicry, similar to animals that have markings that look like eyes. The lizard is brown with darker and lighter speckles and it sometimes has yellow spots too. Its belly is pale with dark spots. Its scales are large and overlap each other, and its eyes are tiny, like little black beads. It grows about a foot long, or 30 cm.

The shingleback lives in arid and desert areas, and its tough skin and overlapping scales help reduce water loss. It eats snails, insects, flowers, and other small animals and plants. When threatened, it will open its mouth wide and stick out its large, dark blue tongue. It is an impressively blue, impressively big tongue, and the inside of the shingleback’s mouth is bright pink, so the lizard has a chance to escape while its predator is startled and wondering if the lizard is dangerous. The shingleback can give a painful bite, although it’s not venomous.

The shingleback mates for life, and the female gives birth to two or three live young every year instead of laying eggs. In many reptiles that give birth to live young, the eggs basically remain in the mother’s body until they hatch, and then she gives birth. But in the shingleback’s case, her babies develop in placentas in a process very similar in many ways to placental mammals. The babies eat the placenta after they’re born, giving them a quick first meal, and they’re born ready to take care of themselves.

Sam suggested we talk about animals that can be confused with inanimate objects, which is a type of camouflage referred to as mimicry. Mimicry of all kinds is a really common type of camouflage, like all those harmless insects that have yellow and black stripes to mimic bees and wasps that can sting.

My favorite inanimate object mimic is a moth we talked about in episode 191, the beautiful wood nymph of eastern North America. It has a wingspan of 1.8 inches, or 4.6 cm, and it is indeed a beautiful little moth. Its front wings are mostly white with brown along the edges and a few brown and yellow spots, while the rear wings are a soft yellow-brown with a narrow brown edge. It has furry legs that are white with black tips. But when the moth folds its wings to rest, suddenly those pretty markings make it look exactly like a bird dropping. It even stretches out its front legs so they resemble a little splatter on the edge of the poop.

If you think about it, it makes sense that a tiny animal like an insect would want to resemble something common in its environment that’s also not eaten by very many other animals. For instance, a stick.

Owen and Aksel wanted to learn more about the walking stick, since it’s been a long time since we talked about it, episode 93. Walking stick insects are also called stick insects or phasmids. When I was a kid I was terrified of the whole idea of a stick insect, although I don’t know why. I think I thought one day I’d climb a tree and discover that some of those sticks were not actually part of the tree. I guess I spent a lot of time climbing trees, but I never actually saw a walking stick insect. Maybe that’s because they were so well camouflaged that I thought they were sticks!

Walking sticks live in trees and bushes, naturally, especially in warm areas, but they’re found on every continent except Antarctica. They’re long, thin insects with long, thin legs and they really do look like sticks. Some are green, some are brown or gray, and many have little patterns, projections, and ridges that make them look even more like real sticks. They’re closely related to another type of phasmid called a leaf insect, which as you may have already guessed, mimics a leaf. All phasmids eat leaves and other plant material and most are nocturnal.

Some phasmids can even change colors to help blend in with their background. The Indian stick insect, which is indeed found in southern India although it’s been introduced in many other parts of the world and is considered invasive in some places, grows up to about 4 inches long, or 10 cm. It’s usually brown, but it can change its color in response to light levels by moving pigment granules in its cuticle that absorb and scatter light. The Indian stick insect has many other ways to hide in plain sight. If it feels threatened, it will stretch out with its rear legs folded flat against its body and its front pair of legs stretched forward to make it look even longer. It will stay perfectly stiff even if someone picks it up, but if it thinks it’s in danger, it will spread its front legs to show a patch of red at the base of the legs. This can startle or frighten a potential predator long enough to let the stick insect get away.

One interesting thing about the Indian stick insect is that almost all individuals are females. Females don’t need to mate with a male to reproduce. The female’s babies are little clones of herself, and she drops an egg every so often onto the ground. It looks like a tiny seed, and ants think it’s a seed and will collect it and take it back to the nest to be stored for later. The egg is then protected until it hatches, when the larval insect leaves the ant nest and finds a tree or bush to hide in.

The buff tip moth also looks like a twig or branch when its wings are folded, but not in the same way the walking stick insect does. It looks like a broken-off branch instead. It’s a fairly large moth with a wingspan more than 2 and a half inches across, or 7 cm, and its wings are mostly gray with a rounded buff patch at the end. The end of its abdomen is buff too, so that it looks like the inside part of a tree branch, that’s paler than the bark. It lives throughout much of Europe and Asia, and different populations look slightly different because they’ve evolved to resemble the branches of different species of tree.

Let’s finish with Nina’s suggestion, about an animal that can change colors really fast to blend in with its background. That’s the cuttlefish, and Nina wanted to know how it changes colors so fast, and while we’re at it, why octopuses are so flexible.

The cuttlefish is a cephalopod, closely related to octopuses and squid, but is quite small in comparison. It has eight arms and two feeding tentacles, just like the squid, but its arms are really small in comparison to its mantle. There are over 100 species known so far, most of which are small enough to fit in the palm of your hand. But unlike the squid or the octopus, the cuttlefish has an internal structure called the cuttlebone. It’s not a bone at all but a modified shell, which is your reminder that cephalopods are mollusks and are distantly related to clams, snails, and many other animals that have shells. The cuttlebone helps the cuttlefish stay buoyant without effort, and it also incidentally makes the body a little more structured than its squid and octopus cousins.

Octopuses are flexible because they have no bones. Basically the only hard structure in an octopus is its beak. A cephalopod’s mouth is in the middle of its arms, so it’s usually hidden from view. Way back in episode 142 we talked about how octopus muscles work, so let’s revisit that briefly. In animals with bones, muscles are attached to the bones. But octopuses don’t have bones.

The octopus’s muscles are structured differently than muscles in animals with bones. Our muscles are made up of fibers that contract in one direction. Let’s say you pick up something heavy. To do so, you contract the fibers in some muscles to shorten them, which makes the bone they’re attached to move. Then, when you push a heavy door closed, you contract other muscles and at the same time you relax the muscles you used to pick up something heavy. This pulls the arm bone in the other direction.

But in the octopus, the fibers in its muscles run in three directions. When one set of fibers contracts, the other two tighten against each other and form a hard surface for the contracted fibers to move. So they’re muscles that also sort of act like bones. It’s called a muscular hydrostat, and it actually can result in muscle movements much more precise than muscle movements where a bone is involved.

So, if you combine the octopus’s strong, precise muscle movements with its general lack of hard structures, you get a very flexible animal. Basically an octopus can squish itself through extremely small openings, as long as its beak will fit through. This can make it really hard to keep an octopus in captivity, because in addition to being flexible and squishy, the octopus is also really intelligent. It can survive for short periods of time out of the water, and it can figure out how to open its enclosure and get out to explore, or just escape.

But, back to the cuttlefish, which is small and needs to hide from predators. Like other cephalopods, the cuttlefish can change color and pattern in less than a second, and can even change the texture of its skin if it wants to look bumpy like the rocks around it.

Cephalopods have specialized cells called chromatophores in their skin. A chromatophore consists of a sac filled with pigment and a nerve, and each chromatophore is surrounded by tiny muscles. When a cuttlefish wants to change colors, its nervous system activates the tiny muscles around the correct chromatophores. That is, some chromatophores contain yellow pigment, some contain red or brown. Because the color change is controlled by the nervous system and muscles, it happens incredibly quickly, in just milliseconds.

But that’s not all, because the cuttlefish also has other cells called iridophores and leucophores. Iridophores are layers of extremely thin cells that can reflect light of certain wavelengths, which results in iridescent patches of color on the skin. While the cuttlefish can control these reflections, it takes a little longer, several seconds or sometimes several minutes.

Like other cephalopods, the cuttlefish uses its ability to change color and pattern in order to hide from predators. It also uses these abilities to communicate with other cuttlefish, because it’s a social animal. It will also sometimes frighten potential predators away with a bright, sudden display of color changing.

The most amazing thing of all is that cuttlefish can’t see colors. They have no color receptors in their eyes. But they accurately change color to match their background, even though they can’t see the color, and they can even do so if it’s almost completely dark. While scientists have some theories as to how the cuttlefish manages this, we don’t yet know how they do it for sure. So it is still a mystery!

You can find Strange Animals Podcast at strangeanimalspodcast.blubrry.net. That’s blueberry without any E’s. If you have questions, comments, corrections, or suggestions, email us at strangeanimalspodcast@gmail.com.

Thanks for listening!

Episode 461: Therizinosaurus and Its CLAWS

Further reading:

Study: Giant Therizinosaurs Used Their Meter-Long, Sickle-Like Claws for Display

Show transcript:

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

I am delighted to report that Therizinosaurus lived in what is now Mongolia in Central Asia, in the Gobi Desert. 70 million years ago, the land wasn’t a desert at all but a forest with multiple rivers and streams flowing through it. Lots of other dinosaurs and birds lived in the area, including a tyrannosaurid called Tarbosaurus that was probably the only predator big enough to kill Therizinosaurus.

When the first Therizinosaurus fossils were discovered in the 1950s, they were initially thought to belong to a type of giant turtle. Later it was reclassified as a sauropod relation, not a turtle. These days, we know for sure it’s not a turtle and we’re pretty sure it’s not anything like a sauropod.

The Therizinosaurus fossils found so far are incomplete. All we have are some ribs, one hind foot, and mostly complete arms and hands. We don’t have any parts of the skull or any vertebrae, so paleontologists still have a lot of questions about what Therizinosaurus looked like and how it lived, although we have more complete specimens of some of its close relations to help scientists make good guesses. Luckily we have its hands, because its claws are enormous. Therizinosaurus had claws bigger than any other dinosaur known.

Therizinosaurus was a big dinosaur overall, with an estimated length of 33 feet, or 10 meters, although until a more complete specimen is discovered we can’t know for sure how big it really was. It may have stood up to 16 feet tall, or 5 meters, and walked on its hind legs. It’s classified as a theropod these days, a group that includes famous dinosaurs like T. rex and Spinosaurus, but it wasn’t closely related to those big fast meat-eaters. Most paleontologists think Therizinosaurus ate plants, but again, we don’t know for sure since we don’t have any of its teeth to examine. Its closest relatives were herbivorous but its immediate ancestors were carnivorous.

If Therizinosaurus was a plant-eater, why did it have such enormous claws? Its claws were seriously terrifying! Its arms were big and strong in general, measuring about 8 feet long, or 2.5 meters, including long, slender fingers, and the claws measured over three feet long! That’s more than a meter long. If the claws were covered with a keratin sheath, which is probable, they would have been even longer when Therizinosaurus was alive. They were relatively thin and straight with a curve at the end.

There are many reasons why an animal develops big claws. Predators need claws to help grab prey or tear meat into pieces, or an animal may need big claws to help it dig or climb trees. Claws are also great for defense. Some animals use claws to grab tree branches and bend them closer to the animal’s mouth, which is something that giant ground sloths probably did, at least sometimes.

The new study published in February 2023 examined the claws of Therizinosaurus and lots of other dinosaurs to learn how strong they were. The claws were 3D scanned, and then the scans were used in various models that measured the stress placed on each claw in various different activities.

The study discovered that the claws of different dinosaurs were strong in different ways depending on what they were used for, which wasn’t a surprise. What was a surprise was that Therizinosaurus’s claws were weak no matter which model the scientists used.

In other words, Therizinosaurus probably didn’t use its claws to fight other dinosaurs unless it just had to, because they would break too easily. It wouldn’t have dug with its claws or even used them to hook branches down closer to its mouth. As far as we can tell, its claws were basically useless.

But obviously, Therizinosaurus used its claws for something or it wouldn’t have evolved to have such gigantic claws. The study concluded that the giant claws must have been for display, to attract a mate or maybe just scare off potential predators.

Lots of animals have special features used to attract a mate, like a peacock’s tail. Sometimes these features serve a double purpose, like a male deer’s antlers. The size of the antlers show how healthy he is, and he also uses them to fight other males. I’m not a claw expert, but as far as I know there aren’t any other animals known that use their claws for display only.

It’s possible that Therizinosaurus did use its claws for something else, we just don’t know what. It’s also possible that the study had flaws that a follow-up study will discover, and Therizinosaurus’s claws weren’t actually so weak. But for now, as far as we know, during mating season Therizinosaurus would strut around waving its super-long claws to show how amazing it was. And, let’s face it, Therizinosaurus really was amazing.

Thanks for your support, and thanks for listening!

Episode 459: Strange Little Dolphins

Thanks to Alexandra, Jayson, and Eilee for their suggestions this week!

Further reading:

Scientists have discovered an ancient whale species. It may have looked like a mash-up of ‘a seal and a Pokémon’

The nomenclatural status of the Alula whale

Field Guide of Whales and Dolphins [1971]

The little Benguela dolphin [photo taken from this site]:

The spinner dolphin almost looks like it has racing stripes [photo by Alexander Vasenin – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25108509]:

The Alula whale, which may or may not exist:

Show transcript:

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

This week let’s learn about some whales and dolphins, including an ancient whale and a mystery whale, all of them really small. Thanks to Alexandra, Eilee, and Jayson for their suggestions!

Let’s start with an ancient whale, suggested by Jayson. The genus Janjucetus has been known since its first species was described in 2006, after a teenage surfer in Australia discovered the fossils in the late 1990s. It grew to about 11 feet long, or 3.5 meters, and lived about 25 million years ago. So far it’s only been found around Australia. But much more recently, just a few months ago as this episode goes live, a new species was described. That’s Janjucetus dullardi, also found in Australia along the same beach where the first Janjucetus species was found, and dating to around the same time period.

We don’t know a lot about the newly described whale, since it’s only known from some teeth and partial skull. Scientists think the individual was a juvenile and estimate it was only around 6 feet long when it died, or 2.8 meters. Small as it was, it would have been a formidable hunter when it was alive. Its broad snout was shaped sort of like a shark’s and it had strong, sharp teeth and large eyes.

Because it was an early whale, it wouldn’t have looked much like the whales alive today. It might even have had tiny vestigial back legs. Its eyes were huge in proportion to its head, about the size of tennis balls, and it probably relied on its eyesight to hunt prey because it couldn’t echolocate.

Its serrated teeth and strong jaws indicate that it might have hunted large animals, but some scientists suggest it could also filter feed the same way a crabeater seal does. Modern crabeater seals have similar teeth as Janjucetus, as do a few other seals. The projections on its teeth interlock when the seal closes its mouth, so to filter feed the seal takes a big mouthful of water, closes its teeth, and uses its tongue to force water out through its teeth. Amphipods and other tiny animals get caught against the teeth and the seal swallows them.

If Janjucetus did filter feed, it probably also hunted larger animals. Otherwise its jaws wouldn’t have been so strong or its teeth so deeply rooted. But Janjucetus wasn’t related to modern toothed whales. While it wasn’t a direct ancestor of modern baleen whales, it was part of the baleen whale’s family tree. Baleen whales, also called mysticetes, have baleen plates made of keratin instead of teeth. After the whale fills its mouth with water, it closes its jaws, pushes its enormous tongue up, and forces all that water out through the baleen. Any tiny animals like krill, copepods, small squid, small fish, and so on, get trapped in the baleen. It’s just like the crabeater seal, but really specialized and way bigger.

Whether or not Janjucetus could and did filter feed doesn’t really matter, because the fact that it’s an ancestral relation of modern baleen whales but it had teeth helps us understand more about modern whales.

Next, Eilee wanted to learn about the Benguela [BEN-gull-uh] dolphin, also called Heaviside’s dolphin. It lives only off the southwestern coast of Africa, and it’s really small, only a little over 5 and a half feet long at the most, or 1.7 meters. It’s dark gray with white markings, with a blunt head that’s almost cone-shaped and a triangular dorsal fin.

The Benguela dolphin is named for its ecosystem. The Benguela current flows northward along the coast, bringing cold, nutrient-rich water up from the depths, which attracts lots of animals. The dolphin lives in relatively shallow water and mainly eats fish and octopuses that it finds on or near the sea floor.

The Benguela dolphin lives in social groups and sometimes hangs out with other species of dolphin. It doesn’t travel very far throughout the year, barely more than 50 miles, or 80 km. When it hunts for food, it uses very high-pitched navigation clicks that orcas can’t hear, but when it’s in safe areas, socializing without any predators around, it communicates and navigates with lower-pitched sounds. Sharks also sometimes attack it and sometimes humans will catch and eat one, but for the most part, it lives a pretty stress-free life just hanging out with its friends and eating little fish. And that’s basically all we know about this little dolphin.

Alexandra wanted to hear about the spinner dolphin, which is common in warmer waters throughout the world. It’s called the spinner dolphin because it likes to leap into the air, spinning around as it does like an American football, which is pretty spectacular. No one except the spinner dolphin is completely sure why it spins, but scientists speculate it serves more than one purpose. The activity takes a lot of energy, so it might be a way to signal to other dolphins that it’s really strong and fit. The big splash when it lands on its side may be a way to communicate with other dolphins. The action might also help dislodge parasites like remora fish that really do attach themselves to bigger, faster animals to hitch rides and incidentally steal food.

Whatever the reason, the spinner dolphin is one of the most acrobatic dolphins in the world. It not only spins, but it jumps around, flips, slaps its tail on the water, and basically acts like a kid on the first swimming pool visit of the summer. Like most dolphins and whales, it’s a social animal, hanging out with friends, family, and sometimes other dolphin species. It eats small animals like fish, squid, and crustaceans, and at least some populations are nocturnal so they can hunt animals that migrate to shallower water at night.

The spinner dolphin is actually pretty small, growing to not quite 7 feet long at most, or 2.4 meters. It’s mainly dark gray on top, lighter gray on the sides, and pale gray or white on its belly.

Let’s finish with our mystery whale or dolphin, called the Alula whale because it was sighted near the town of Alula, Somalia at some time prior to the early 1970s. In 1971 a Dutch sea captain reported that he had seen these whales on multiple occasions, in the Gulf of Aden and the Indian Ocean. But although it’s a distinctive-sounding whale or dolphin, its existence hasn’t been verified.

Captain Willem Mörzer Bruyns, whose name I have mispronounced, described the Alula whale as being similar in size and shape to the orca or pilot whale, with a tall dorsal fin and rounded forehead. It was sepia brown all over, though, except for white scars all over its body that were shaped sort of like stars. He reported seeing small groups of these whales, anywhere from 4 to 8 of them, traveling together on at least four occasions. He estimated the whales were up to 24 feet long, or 7.2 meters.

There’s quite a bit of confusion about this mystery whale spread across the internet. Some sites I looked at mentioned a book written by Mörzer Bruyns called Field Guide of Whales and Dolphins, published in 1971, but quoted a different book, A World Guide to Whales, Dolphins, and Porpoises published in 1981 by Donald S. Heintzelman.

Let me quote the relevant paragraphs from the 1971 book, the original:

“At first encounter a school of 4 approached the ship head on and seeing the dorsal fins the author thought they were [orcas]. When they passed the ship at a distance of less than 50 yards just under the surface in the flat calm, clear sea, it was obvious that this was a different species. … These dolphins were seen in the area during crossings in April, May, June and September, usually swimming just under the surface with the dorsal fin above the water. One duty officer reported he observed them chasing a school of smaller dolphins, who tried to escape. There is, however, a possibility that both species were chasing the same prey.”

If you go to Wikipedia to read about the Alula whale, as of mid-November 2025, it states that the dorsal fin was about 6 and a half feet tall, or 2 meters. But Mörzer Bruyns reported that the dorsal fin was 2 feet tall, or about 60 cm. That’s an important difference. Orcas, AKA killer whales even though they’re actually big dolphins, are distinctively patterned with black and white, and a male orca can have a dorsal fin up to 6 feet tall, or 1.8 meters, while a female’s is typically less than half that height. The pilot whale is also a dolphin, despite its name, but it has a relatively small dorsal fin and is black, dark gray, or sometimes brown. Some researchers suggest that Mörzer Bruyns misidentified pilot whales as something mysterious, but the details he provided don’t really match up.

There are a lot of little-known whales alive today, some only discovered in the last few decades. It’s possible that the Alula whale really is a very rare small whale or dolphin. It’s not clear from his report, but it sounds like Mörzer Bruyns saw the whales on several occasions in the same year. If so, maybe the Alula whale doesn’t actually live in that part of the ocean most of the time, and Mörzer Bruyns saw the same small group several times that just happened to have traveled to the Indian Ocean that year. Maybe no one else has seen them because they’re all living in some remote part of the ocean where humans seldom travel. Hopefully someone will spot one soon.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!

Episode 455: Spooky Animals

Thanks to Richard of NC, Richard my brother, Siya, Ezra, and Owen and Aksel for their suggestions this week!

Further reading:

Creature Feature: Googly-Eyed Stubby Squid

Nocturnal Spiders Use Trapped Fireflies as Glowing Bait to Attract Additional Prey

A male vampire deer:

The adorable googly eyed squid [still taken from video linked above]:

The snowy owl [photo by Bill Bouton from San Luis Obispo, CA, USA – Snowy Owl, Bubo scandiacus, male, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=19899431]:

Show transcript:

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

This week for monster month, let’s learn about some animals that are considered spooky, although in actuality they’re just regular animals who don’t even know the meaning of spooky. Thanks to Ezra, Owen and Aksel, Richard from NC, my brother Richard, and Siya for their suggestions!

We’ll start with the two Richards. Richard from NC suggested vampire deer, and my brother Richard suggested zombie salmon.

The vampire deer is more commonly called the water deer, but considering it has tusks growing down from its upper jaw that look like fangs, vampire deer is an excellent name. Females have short tusks, but in males they grow quite long, sometimes over 3 inches long, or 8 cm. Since the animal only stands about two feet tall at the shoulder, or 65 cm, that’s pretty impressive. Its hind legs are longer than its front, so that when it runs it sort of bounces like a rabbit. It has a very short tail, small rounded ears, and is golden brown in color with a lighter underside. It doesn’t have antlers. We talked about the musk deer in episode 366, which also has fangs instead of antlers, but the vampire deer isn’t closely related to the musk deer.

The vampire deer currently lives in Korea, China, and Russia although it used to be much more widespread. It mostly lives in reedy habitats near rivers, and it’s a solitary animal although females will sometimes congregate to eat. Males protect their territories by fighting with their tusks, although they don’t actually drink blood.

As for the zombie salmon, it’s not a type of fish but something that can happen to an ordinary salmon. The salmon is a fish that famously spends most of its adult life in the ocean, but travels up rivers to spawn. The eggs hatch in freshwater and the baby fish grow up in the river, and then they migrate to the ocean and live there for almost the rest of their lives. Eventually the fish is fully mature and ready to spawn, so it travels to the river where it was hatched, fights its way upstream, and the cycle starts all over with the new generation.

Almost all salmon die after spawning. This is partly because the energy requirements of swimming upstream is so high, but also because a salmon is genetically programmed to die after spawning. This is called senescence, and while it’s common in invertebrates like octopuses and some insects, it’s rare in vertebrates. Not only that, there’s not enough food for an adult salmon in the spawning area, and an adult salmon’s body is adapted for salt water, not fresh water, so it can’t live long in rivers as an adult anyway.

A small number of female Atlantic salmon are able to return to the ocean, recover and regain their strength, and spawn again a few years later, but for all other species, after spawning, that’s it. Within days all the salmon have died.

But sometimes, rarely, a salmon remains alive for weeks after spawning. It doesn’t have the energy to return to the ocean, and its body is in the process of shutting down for planned senescence, and the freshwater is causing damage to the fish’s skin. But still it survives, growing more and more raggedy, just like a zombie in a movie. But unlike movie zombies, it doesn’t want to eat brains. Eventually the zombie salmon dies, if something doesn’t catch and eat it first.

Next, Siya suggested the googly-eyed squid. Some people find squid and octopuses scary because they look so strange, but I admit I added this squid to the episode because I think its name is funny. It’s also called the stubby squid or the googly-eyed stubby squid. Its scientific name is Rossia pacifica, which gives you a hint that it lives in the northern Pacific Ocean. In the winter it likes shallow water without strong currents, but in summer it migrates to deeper water where it doesn’t get too warm.

The googly-eyed squid is small and closely related to the cuttlefish. It grows less than four and a half inches long, or 11 cm, including its eight short arms and two retractable tentacles. It’s usually reddish-brown or purplish in color, but like most squid it can change color when it needs to. It gets its name because it has large eyes that show white around the edges and have a black pupil, which makes it look like it has googly eyes.

During the day, the googly-eyed squid buries itself most of the way in sand or mud at the bottom of the sea floor, with just its googly eyes showing so it can watch for danger. At night it comes out to hunt small animals like crabs and other crustaceans, mollusks, and fish, but what it really likes is shrimp. Naturally, it has good eyesight.

Next, let’s talk about a bird that some people find spooky. Ezra, Owen, and Aksel all suggested the snowy owl.

The snowy owl is mostly snow-white although young birds have black and gray markings. Its eyes are yellow and it often hunts in the daytime, but not always. Its wingspan can be as much as six feet across, or 1.8 meters.

The snowy owl lives throughout the Arctic and nearby regions, especially in summer, but sometimes travels long distances to find food. It’s also migratory, traveling south for the winter. Snowy owls have been spotted in such far-flung places as Hawaii, Bermuda, Pakistan and India, Iran, and Japan and Korea.

The snowy owl mostly eats small animals like lemmings and mice, although it will kill and eat pretty much anything it can catch, including ducks and other water birds, fish, and even insects and frogs. It will sometimes eat carrion and even sometimes steals food from other birds. It swallows small animals whole, and a day or two later, regurgitates a compacted pellet made up of the indigestible parts, including bones and fur. A lot of predatory birds do this, not just snowy owls. Scientists who study the birds love finding these pellets, because they can dissect them and learn what the bird has been eating.

Not only does the snowy owl make its nest on the ground, sometimes it hunts on the ground too, just running along after an animal on its big feet.

This is what the snowy owl sounds like:

[owl call]

Let’s finish with an invertebrate that a lot of people are scared of, a spider! This particular spider is a species of sheet-web spider, which lives in Taiwan. It’s a nocturnal spider that was only described in 2012. Unlike a lot of spiders, which build upright webs to trap insects that are flying along between branches and twigs, the sheet-web spider builds its web horizontally just above the ground.

The webs are light-colored and reflect light. The spiders build their webs in shady areas, and scientists think that moths see the light reflecting off the webs, and think the webs are actually the ground in an area open to the sky. Moths like open areas like this, and moths also happen to be one of the spider’s favorite foods. When a group of scientists experimented by darkening some webs with charcoal dust, they determined that the darkened webs attracted considerably fewer moths.

But it turns out that the sheet-web spider does something even more extraordinary. If a firefly gets caught in the web, the spider doesn’t eat it—or at least, not right away. It lets it stay in the web, flashing its light. Scientists noticed this and were intrigued. Did the fireflies not taste good, or was something else going on?

They placed LEDs that blinked like fireflies in some webs, but not in others, and monitored the results. It turns out that three times the number of insects were attracted to the webs with fake fireflies, and most of those were other fireflies. Fireflies attract a mate by flashing. The spiders were taking advantage of having a built-in lure stuck in their webs. So even though spiders are very tiny and have tiny brains, sometimes they’re pretty darn smart.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!

Episode 452: Rare Wallabies and Two Hoofed Beasts

Thanks to Brody, Oz, and Sam for their suggestions this week!

Further reading:

Chasing gold

Two spectacled hare-wallabies hanging out under a spinifex bush [picture from this site]:

A regular swamp wallaby [photo by jjron – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=4022233]:

The glorious golden swamp wallaby [photo by Jack Evershed, taken from the first article linked above]:

The takin can also be golden:

The gaur is so incredibly big! It’s so big, honestly, it’s just ridiculous:

Show transcript:

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

This week we have suggestions from Oz, Sam, and Brody, with some interesting mammals!

Let’s start with Brody’s suggestion, the wallaby! It’s been a while since we talked about the wallaby, which is an adorable marsupial closely related to the kangaroo. It’s native to Australia and New Guinea, part of the family Macropodidae.

One thing everyone knows about kangaroos, which is also true for wallabies, is that they hop instead of running. Their hind legs are extremely strong with big feet, and in fact the word Macropodidae means big feet. The animal hops by leaning forward and jumping, with its big hind feet leaving the ground at about the same time, and landing at the same time too before it bounces again. Its big tail helps it balance.

We talked about the wallaby last in episode 390, so let’s learn about some species of wallaby that we didn’t talk about then. For example, the spectacled hare-wallaby. It’s a small species that’s common in northern Australia and parts of Papua New Guinea. It’s active at night and is mostly solitary, so unless you’re wandering around at night you might not have seen one. It’s called the spectacled hare-wallaby because it has orange-colored fur around its eyes so that it looks sort of like it’s wearing glasses. The rest of its fur is brown, gray, and golden. Its ears are small and its tail and hind legs are very long, with short little front legs. It’s very cute.

The spectacled hare-wallaby prefers sandy or stony areas, like dunes and shrubland, where it can find lots of plants to eat but can easily hop away if it spots a predator. It’s smaller than a domestic cat, but it can travel incredibly fast when it wants to.

If you live along the eastern part of Australia, you might have seen the swamp wallaby, also called the black wallaby because it’s mostly dark gray or gray-brown in color, often with a white tip to the tail. It’s stocky and much larger than the spectacled hare-wallaby, almost three feet tall, or 85 cm, when it’s sitting up. It doesn’t just live in swamps but also likes forests and other areas with lots of places to hide. Unlike the spectacled hare-wallaby, it’s not that fast and can’t always outrun potential predators, but it’s good at hiding because its fur is so dark.

Most wallabies are grazers, meaning they mainly eat grass, but the swamp wallaby is a browser. Instead of having grinding teeth to break down grass, its teeth are sharper for cutting through plant material like bushes, shrubs, and ferns. The swamp wallaby will even use its front legs to pull branches into reach so it can eat the leaves.

Wallabies are marsupials, meaning the babies are born extremely early by our standards, crawl into the mother’s pouch and clamp onto a teat, and continue to develop in the pouch. Wallabies usually only have one baby at a time, but the mother swamp wallaby has two babies in its pouch almost all its adult life. The swamp wallaby has two uteruses, and a few days before the first baby is ready to be born, the female comes into estrus again, meaning she’s ready to mate. By the time her first baby is born, she’s already pregnant with her second baby. When the second baby is born, the first baby is old enough that’s it doesn’t spend all the time in the pouch—but by then, she’s already pregnant with her third baby. By the time the third baby is born, the first baby is grown up and on its own, the second baby is old enough that it isn’t in the pouch all the time, and—you guessed it—the mother is already pregnant with baby four. It sounds exhausting, but it works well for the swamp wallaby.

As I mentioned, the swamp wallaby is also called the black wallaby, but there’s a rare color variation that’s called a golden swamp wallaby. It’s still a swamp wallaby but its fur is golden yellow and it has a white face. The coloration is due to a mutation in coat color, but golden swamp wallabies seem to be perfectly safe in the few areas where they’re found, so it doesn’t seem to be a detriment. Some scientists suspect the color morph is helpful in open forests with sandier soil, which is exactly where the golden swamp wallabies are found.

Speaking of golden animals, let’s talk next about the takin, suggested by Sam. We talked about the golden takin back in episode 218, which is a subspecies of takin. The takin is closely related to sheep and mountain goats, but it looks more like a small musk ox.

The takin lives in the eastern Himalaya Mountains, and is a strong, stocky animal with a lot of adaptations to intense cold. It has a thick coat that grows even thicker in winter, with a soft, dense undercoat to trap heat next to the body. It also has large sinus cavities that warm the air it breathes before it reaches the lungs, which means it has a big snoot. Its skin is oily, which acts as a water repellent during rain and snowstorms. In spring it migrates to high elevations, but when winter starts it migrates back down to lower elevations where it’s not quite as cold.

It will eat just about any plant material it can reach, including tree bark, tough evergreen leaves, and bamboo. It sometimes shares the same bamboo forests where pandas live. It will even sometimes push over small trees so it can eat the leaves. It visits salt licks regularly, and some researchers think it needs the minerals available at salt licks to help neutralize the toxins found in many plants it eats.

Both male and female takins have horns, which grow sideways and back from the forehead in a crescent and can be almost three feet long, or 90 cm. It can stand over four feet tall at its humped shoulder, or around 1.4 m. Its fur is mainly golden-brown with gray and white patches.

A full-grown takin is big enough and strong enough that it doesn’t have many predators. If a bear or wolf threatens it, it can run fast if it needs to or hide in dense underbrush. But it’s just a little tiny baby compared to our last animal this week, suggested by Oz: the gaur. [pronounced gow-ur]

We’ve only mentioned the gaur once on the podcast, way back in episode 58, when I mispronounced it “gar.” It’s the largest living bovid, also called the Indian bison, although it doesn’t just live in India. It’s native to southeast Asia, but it’s increasingly rare due to habitat loss and poaching, even though it’s a protected animal.

The gaur looks kind of like a domestic cow, but much larger. It’s dark brown and its lower legs are white, as is its nose. It has a fairly short tail and long curving horns that are mostly pale but black at the tips, and its ears are large. Females are lighter in color than males and calves are a pale sandy-brown.

How big is the gaur? A big bull can grow over seven feet high at the shoulder, or 2.2 meters, and it’s even a bit taller if you measure it at the muscular hump just behind the shoulder. It’s an incredibly heavy animal too, with only elephants, rhinos, hippos, and giraffes being heavier than a big bull. A bull can weigh over 3,300 lbs, or 1,500 kg. It’s so massive and muscular that bulls in particular look like they just got back from the gym and they’re flexing to show off.

The gaur is a bovid, but it doesn’t eat very much grass. Like the swamp wallaby, it’s a browser. It’s mainly found in forests, where it eats leaves, flowers, fruit, and even the bark of some trees, and it lives in herds of about a dozen animals each led by a wise old cow.

Almost the only predator that can kill a full-grown gaur is a tiger, and naturally the gaur does not like tigers at all as a result. If a herd spots a tiger, they form a ring around the calves to protect them, and if the tiger tries to approach, the adult gaurs attack and try to drive the tiger away. Sometimes the gaurs can even kill the tiger. At night the adult gaurs make a ring around the calves this same way, so that if a tiger or other predator approaches in the night, the adults are ready to defend their babies as soon as they wake up. Personally, if I were a tiger I think I wouldn’t bother trying to kill a gaur.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!

Episode 450: Geckos and the Snow Leopard

Thanks for Preston and Pranav for suggesting this week’s topics!

Further reading:

DNA has revealed the origin of this giant ‘mystery’ gecko

Snow Leopards Dispersed Out of Tibetan Plateau Multiple Times, Researchers Say

Conquest of Asia and Europe by snow leopards during the last Ice Ages uncovered

The crested gecko AKA the eyelash gecko:

The fluffy snow leopard:

Show transcript:

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

This week we have a couple of suggestions from Preston and one from Pranav! This is the first episode I’ve recorded in my new apartment, so let’s make it a good one.

First, Preston wanted to learn more about the crested gecko, mainly because he has a pet crested gecko named George Washington. That is one of the best gecko names ever!

The crested gecko is also called the eyelash gecko. We’ve talked about it a few times, but not recently at all. It’s native to a collection of remote Pacific islands called New Caledonia, where it spends most of its time in trees, eating insects and other small animals, but also fruit, nectar, and lots of other food. It’s an omnivore and nocturnal, and can grow more than 10 inches long, or 25 cm. It gets its names from the tiny spines above its eyes that look like eyelashes, and more spines in two rows down its back, like a tiny dragon. It can be brown, reddish, orange, yellow, or gray, with various colored spots, which has made it a popular pet. These days all pet crested geckos were bred in captivity, since it’s now protected in the wild.

The crested gecko has tiny claws on its toes, which is unusual since most geckos don’t have claws. It can drop its tail like other geckos if a predator is after it, but the tail doesn’t grow back. Since its tail is prehensile and helps it climb around in trees, you’d think the gecko would have trouble climbing after it loses its tail, but it doesn’t. Maybe that’s because in addition to claws, like other geckos it has basically microscopic hairlike structures on its toes that allow it to climb smooth surfaces like windows and walls and the trunks of smooth trees. It can also jump long distances to get to a new branch.

The crested gecko was discovered by science in 1866, but wasn’t seen after that in so long that people thought it was extinct. Then in 1994, a German herpetologist out looking for specimens after a tropical storm found a single crested gecko. It turns out that the geckos had been fine all along, but because they’re nocturnal and mostly live in trees, scientists just hadn’t spotted any.

While we’re talking about geckos, Pranav requested that we revisit Delcourt’s giant gecko with some updated information. We did mention the new findings back in episode 389, but it’s really interesting so let’s go over it again.

Way back in episode 20 we talked about Delcourt’s giant gecko, which is only known from a single museum specimen donated in the 19th century. In 1979 a herpetologist named Alain Delcourt, working in the Marseilles Natural History Museum in France, noticed a big taxidermied lizard in storage and wondered what it was. It wasn’t labeled and he didn’t recognize it, surprising since it was the biggest gecko he’d ever seen—two feet long, or about 60 cm. He sent photos to several reptile experts and they didn’t know what it was either. Finally the specimen was examined and in 1986 it was described as a new species.

No one knew anything about the stuffed specimen, including where it was caught. At first researchers thought it might be from New Caledonia since a lot of the museum’s other specimens were collected from the Pacific Islands. None of the specimens donated between 1833 and 1869 had any documentation, so it seemed probable the giant gecko was donated during that time and probably collected not long before. More recently there was speculation that it was actually from New Zealand, since it matched Maori lore about a big lizard called the kawekaweau.

In June of 2023, Delcourt’s gecko was finally genetically tested and determined to belong to a group of geckos from New Caledonia, the same archipelago of islands where the crested gecko is from. Many of its close relations are large, although not as large as it is. It’s now been placed into its own genus.

Of course, this means that Delcourt’s gecko isn’t the identity of the kawekaweau, since it isn’t very closely related to the geckos of New Zealand, but it might mean the gecko still survives in remote parts of New Caledonia. It was probably nocturnal and lived in trees, hunting birds, lizards, and other small animals.

Now we’re done with geckos for today, but we’re not done with this episode! Preston also wanted to learn about the snow leopard, and it’s amazing that we’ve never talked about it before! The snow leopard is a big cat that’s most closely related to the tiger, although they don’t look very much alike. The term big cat refers to tigers, lions, leopards, snow leopards, and jaguars, but it can also include cheetahs and cougars depending on who you ask. Big cats have round pupils instead of slit pupils like domestic cats and other smaller cats.

The snow leopard mostly lives in cold, mountainous areas in parts of Asia, from Siberia to India. It prefers to live in rocky areas where its coat pattern hides it from its prey. Its fur is thick and it can be anywhere from pure white to tan or gray, with black spots and rosettes. Its head is small, its legs relatively short, and its tail is very fluffy and incredibly long. A big male can grow up to 1.5 meters long, or 5 feet, plus a tail that’s almost as long as his body, but he’s only about two feet tall at the shoulder, or not quite 60 cm.

The snow leopard is well adapted to cold and snow. Fur grows on the underside of its paws to keep its feet warm, its paws are really large to act as snowshoes, and its ears are small and rounded to keep the tips from being frostbitten. Its long tail helps it balance when climbing over rocks. Its tail also stores fat, and is so long and fluffy that the snow leopard can use its tail as a blanket when it’s sleeping. Built-in blanket!

Unfortunately for the snow leopard, its thick, beautiful fur has been used as a blanket by humans for a long time, and it’s still sometimes killed for its fur even though it’s a protected species almost everywhere it lives. It’s also sometimes killed by farmers and herders who think the snow leopard will kill their livestock. It actually doesn’t attack livestock very often, and almost never attacks people. It eats small animals of various kinds depending on where it lives, like mice and rats, hares and rabbits, wild goats and sheep, marmots, deer, civets, and even rhesus macaques. It mainly only kills livestock where its wild prey has been reduced because of human activity. It’s also vulnerable to habitat loss and climate change.

Snow leopards are mostly solitary, although a mated pair will hunt together and of course the mother snow leopard teaches her babies to hunt as they get older. Individuals leave scent marks and spray urine to let other snow leopards know they’re around. Males roam widely but females usually stay to a territory that they’re familiar with, although the territory may be quite large.

Most snow leopard cubs are born in the early summer, and a female usually only has two or three babies in a litter. The mother takes care of her babies by herself. She makes a den among rocks and lines it with her belly fur, but cubs are born with a lot of fur already to keep them warm. The mother takes care of them for about two years until they finally leave to find their own territories.

Lions, tigers, leopards, and jaguars can all roar. Snow leopards, cheetahs, and cougars can’t. But snow leopards, cheetahs, and cougars can purr, while lions, tigers, leopards, and jaguars can’t. The ability to roar is due to special adaptations in the larynx, but these adaptations also mean the animal can’t purr. So basically a cat can either roar or purr but not both and the snow leopard can purr.

We actually don’t know a whole lot about the snow leopard because it lives in such remote places, and one big mystery is how the snow leopard ended up adapted to cold. Most cats, large and small, prefer hot climates. Until recently, we didn’t even have any snow leopard fossils to give us a clue.

Then a collection of leopard fossils revealed some snow leopard fossils mixed in. They’re about a million years old, collected in parts of China, France, and Portugal. A study of the fossils, and a beautifully preserved partial skeleton found in Portugal, has shed light on the migration and evolution of the snow leopard.

The snow leopard was already well adapted for mountainous areas, but when the climate became colder during the Pleistocene, AKA the Ice Age, it evolved to thrive in a cold climate. It spread into many parts of Asia and Europe, especially mountainous areas, out-competing other predators like leopards that weren’t well adapted to cold. With the warming climate after the ice ages ended, the snow leopard was at a disadvantage and gradually died out except around the Tibetan plateau where it still lives today, and we’re very lucky to still have it.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!

Episode 446: Termites

Thanks to Yonatan and Eilee for this week’s suggestion!

Further reading:

Replanted rainforests may benefit from termite transplants

A vast 4,000-year-old spatial pattern of termite mounds

A family of termites has been traversing the world’s oceans for millions of years

Worker termites [photo from this site]:

Show transcript:

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

This week we have a topic I’ve been wanting to cover for a while, suggested by both Yonatan and Eilee. It’s the termite episode!

We talk a lot about animals that eat termites, and in many cases termite-eating animals also eat ants. I’ve always assumed that termites and ants are closely related, but they’re not. Termites are actually closely related to cockroaches, which are both in the order Blattodea, but it’s been 150 million years since they shared a common ancestor. They share another trait too, in that no one wants either insect infesting their house.

Like most cockroach species, though, most termite species don’t want anything to do with humans. They live in the wild, not in your house, and they’re incredibly common throughout most of the world. That’s why so many animals eat termites almost exclusively. There are just so many termites to eat!

There are around 3,000 species of termite and about a third of them live in Africa, with another 400 or so in South America, 400 or so in Asia, and 400 or so in Australia. The rest live in other parts of the world, but they need warm weather to survive so they’re not very common in cold areas like northern Europe.

A termite colony consists of a queen, soldiers, and workers, which sounds very similar to ants, but there are some major differences. Worker termites take care of the nest and babies, find and process food so the other termites can eat it, and store the processed food. They also take care of the queen. Unlike ants and bees, worker termites aren’t only female and aren’t always sterile. Soldiers are bigger and stronger than workers, with much bigger heads and jaws so they can fight off potential predators. In some species, the soldiers have such big jaws that they can’t actually eat without help. Worker termites feed them. Finally, the queen is the largest individual in the colony, usually considerably larger than workers, but unlike queen bees and ants, she has a mate who stays with her throughout her life, called a king. Some termite queens can live to be as much as 50 years old, and she and the king spend almost their entire lives underground in a nesting chamber.

The larger the colony, the more likely it is that the colony has more than one queen. The main queen is usually the one that started the colony along with her king, and when it was new they did all the work—taking care of the eggs and babies, foraging for food, and building the nest itself. As the first workers grew up, they took on more of those tasks, including expanding the nest.

Workers are small and their bodies have little to no pigment, so that they appear white. Some people call them white ants, but of course they’re not ants. Workers have to stay in a humid environment like the nest or their bodies dry out. Workers and soldiers don’t have eyes, although they can probably sense light and dark, and instead they navigate using their antennae, which can sense humidity and vibrations, and chemoreceptors that sense pheromones released by other termites.

Termites have another caste that’s not as common, usually referred to as reproductives. These are future kings and queens, and they’re larger and stronger than workers. They also have eyes and wings. When outside conditions are right, usually when the weather is warm and humid, the reproductive termites leave the nest and fly away. Males and females pair off and search for a new nesting site to start their own colony.

Termites mainly eat dead plant material, including plant material that most other animals can’t digest. A termite’s gut contains microbes that are found nowhere else in the world, which allow the termite to digest cellulose found in plants, especially wood. Baby termites aren’t born with these microbes, but they gain them from worker termites when the babies are fed or groomed.

In some areas termites will eat the wood used to build houses, which is why people don’t like them, but termites are actually important to the ecosystems where they live, recycling nutrients and helping break down fallen trees so other plants can grow. They also host nitrogen-fixing bacteria, which are important to plant life.

A recent study in Australia determined that termites are really important for rainforest health. In some parts of Australia, conservation groups have started planting rainforest trees to restore deforested areas. Decomposers like termites are slower to populate these areas, with one site that was studied 12 years after planting showing limited termite activity. That means it takes longer for fallen branches, logs, and stumps to decay, which means it takes longer for the nutrients in those items and others to be available for other plants to use.

The problem seems to be that the new forests don’t have very many dead trees yet, so the termites don’t have a lot to eat. The team is considering bringing in fallen logs from more established forests so the termites have food and can establish colonies more easily.

Some species of termite in Africa, Australia, and South America build mounds, and those mounds can be huge. A mound is built above ground out of soil and termite dung, held together with termite saliva. It’s full of tunnels and shafts that allow the termites to move around inside and which bring air into the main part of the nest, which is mostly below ground. Different species build differently-shaped mounds, including some that are completely round.

Some termite mounds can be twice the height of a tall person, and extremely big around. The biggest measured had a diameter of almost 100 feet around, or 30 meters. But in at least one place on earth, in northeastern Brazil, there’s a network of interconnected termite mounds that is as big as Great Britain.

The complex consists of about 200 million mounds, each of them about 8 feet tall, or 2.5 meters, and about 30 feet across, or 9 meters. They’re just huge piles of soil excavated from underground, and tests have determined that the mounds range in age from 690 years old to at least 3,820 years old and are connected by tunnels–but the nests under the mounds are still in use!

Not all termite species build mounds or even live underground. A group called drywood termites live in wood and usually have much smaller colonies than other termites. They probably split off from other termites about 100 million years ago, and a 2022 genetic study determined that they probably originated in South America. But drywood termites have spread to many other parts of the world, and scientists think it’s because their homes float. They estimate that over the last 50 million years, drywood termites have actually floated across entire oceans at least 40 times. When their floating log homes washed ashore, the termites colonized the new land and adapted to local conditions.

A lot of people worry that termites will damage their homes, but in many parts of the world, people eat termites. The termites are fried or roasted until they’re nicely crunchy, and they’re supposed to have a nut-like flavor. They’re also high in protein and important fats. So the next time you worry about your house, you can shout at any potential termites that if they’re around, you might just eat them as a snack.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!

Episode 441: Mean Birds

Thanks to Maryjane and Siya for their suggestions this week!

Further reading:

Look, don’t touch: birds with dart frog poison in their feathers found in New Guinea

The hooded pitohui:

The rufous-naped bellbird:

The regent whistler:

Show transcript:

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

This week we’re going to learn about some birds that by human standards seem pretty mean, although of course the birds are just being birds. Thanks to Maryjane and Siya for their suggestions this week!

We’ll start with Maryjane’s suggestion, the Northern shrike. It lives in North America, spending winter in parts of Canada and the northern United States. In summer it migrates to northern Canada. It’s a lovely gray and black bird with a dark eye streak, white markings on its tail and wings that flash when it flies, and a hooked bill. It’s a strong bird about the size of an American robin, and both the male and female sing. They will sometimes imitate other bird songs, and during breeding season a pair will sing duets. The Northern shrike looks very similar to the loggerhead shrike that lives farther south, in the southern parts of Canada and throughout most of the United States and Mexico.

Most important to us today, the Northern shrike is sometimes called the butcher bird, because in the olden days, butchers would hang meat up to cure–but we’ll get to that part.

It prefers to live in the edges of a forest near open spaces, and in the summer it lives along the border of the boreal forest and tundra. While it’s just a little songbird, in its heart it’s a falcon or hawk. It eats a lot of insects and other invertebrates, especially in summer, but it mainly kills and eats other songbirds and small mammals like mice and lemmings, even ones that are bigger and heavier than it is.

The shrike has ordinary feet for a perching bird, not talons, but its feet are strong and can hold onto struggling prey. Its beak is deadly to small animals. The bill has a sharp hook at the end and is notched so that it has two little projections that act like fangs. It will hover and drop onto its prey, or grab a bird in mid-flight and bear it to the ground to kill it. Sometimes it will hop along the ground until it startles a bird or insect into flying away. It will even flash the white patches on its wings to frighten hidden prey into moving.

If the shrike kills a wasp or bee, it will remove the stinger before eating it. It will pick off the wings of large insects and will sometime beat a dead insect against a rock or branch to soften it up and break off parts of the hard exoskeleton before eating it.

Shrikes are territorial and will chase away birds that are much bigger than them, like ducks and even geese. During nesting season, the female takes care of the eggs and the male provides food for her. To prove that he can provide lots of food for the female while she’s incubating the eggs, he will cache food throughout his territory in advance. This is something shrikes do anyway, but it’s especially important during nesting season.

If a shrike catches an animal it doesn’t want to eat right away, it will store it for later. It will cram it into a crack in a rock, impale it on a thorn or other sharp item like the points of a barbed wire fence, or wedge it into the fork of a tree branch. Then it can come back and eat it in a day or two when it’s hungry, or take the food to its mate.

When the eggs hatch, both parents help feed the babies. When the babies are old enough to leave the nest, the parents go their separate ways, but they will often each take some of the fledglings with them so they can continue to feed them and help them learn to hunt. Since a nest can have as many as nine babies, it’s not always possible for one parent to take all the babies. The siblings stick together even once they’re mostly grown and independent, often through their first winter.

This is what a Northern shrike sounds like:

[Northern shrike call]

We talked about some poisonous birds in episode 222, but Siya wanted to learn more about them. In that episode we mostly talked about the hooded pitohui, but since then, two more poisonous birds have been discovered in New Guinea.

Let’s refresh our memories about the hooded pitohui, mostly because its discovery by scientists is such a fun story.

The hooded pitohui lives in forests throughout much of New Guinea and eats seeds, insects and other invertebrates, and fruit. It’s related to orioles and looks very similar, with a dark orange body and black wings, head, and tail. It’s a social songbird that lives in family groups where everyone works to help raise the babies.

The people who live in New Guinea knew all about its toxicity, of course. They mentioned this to European naturalists as long ago as 1895, but weren’t believed, because the scientists had never heard of a toxic bird. It wasn’t until 1989 that a grad student studying birds of paradise made a surprising discovery.

Jack Dumbacher was trying to net some birds of paradise to study but kept catching pitohuis in his nets. He would untangle the birds and let them fly away, but naturally they were upset and one scratched him. He was in a hurry so he just licked the cuts clean. His tongue started to tingle, then burn, and then it went numb.

Fortunately the effects didn’t last long, but he mentioned it to another researcher who had had a similar experience. They realized something weird was going on, so Dumbacher asked some of the local people what the cause might be. They all said, “Yeah, don’t lick the pitohui bird.”

Dumbacher did, though, because sometimes scientists have to lick things. The next time his nets caught a pitohui, Dumbacher plucked one of its feathers and put it in his mouth. His mouth immediately started to burn.

Dumbacher was amazed to learn about a toxic bird, but it took a year for anyone else to take an interest, specifically Dr. John W. Daly, an expert in poison dart frogs in Central and South America. Back in the 1960s while he was studying the frogs, in order to determine which ones were actually toxic and which ones weren’t, he frequently poked a frog and licked his finger, so Daly completely understood Dumbacher putting a feather in his mouth.

Maybe don’t put random stuff in your mouth. Both Dumbacher and Daly were lucky they didn’t die, because it turns out that poison dart frogs and pitohuis both contain one of the deadliest neurotoxins in the world, called batrachotoxin.

A chemical analysis determined that both animals excrete the same toxin. In captivity, poison dart frogs lose their toxicity. Daly was the one who figured this out, but he couldn’t figure out why except that he was pretty sure they absorbed the toxins from something they were eating in the wild. He thought the same might be true for the pitohui.

Dumbacher agreed, and after he achieved his doctorate he started making expeditions to New Guinea to try to find out what. Both he and Daly thought it was probably an insect. But there are a lot of insects in Papua New Guinea and he couldn’t stay there and test insects for toxins all the time. He came and went as often as he could, and to make his trips easier he left his equipment in a village rather than hauling it back and forth with him.

What he didn’t know is that one villager, named Avit Wako, had gotten interested in the project. When Dumbacher was gone, he continued the experiments. In 1995 Dumbacher sent a student intern to the village, since he didn’t have time to go himself, and Avit Wako said, “Hey, good to see you! I solved your problem. The toxin comes from this particular kind of beetle.” He was right, too. The toxin comes from beetles in the genus Choresine.

But the pitohui isn’t the only toxic bird in New Guinea. In 2018 and 2019, two researchers from the University of Copenhagen in Denmark got interested in poisonous birds and did some studies. One of the scientists is Kasun Bodawatta, whose colleagues thought he was having a rough time during the trip. The life of a scientist in the field can be hard, and Bodawatta kept having issues with a runny nose and weepy eyes. It wasn’t allergies or exhaustion, though, but the result of handling poisonous birds and their feathers. He described it as feeling “like cutting onions, but with a nerve agent.”

Bodawatta’s team discovered that two more birds in New Guinea contain the same toxins as the pitohui in their feathers and skin. The rufous-naped bellbird is gray-brown with white and yellow markings, and a patch of rufous on the back of its head. The regent whistler is black and yellow with a white patch on its throat. Both eat insects as a large part of their diets, and both show similar genetic mutations that allow them to sequester the Choresine toxins in their feathers and skin. Not only does this keep potential predators from eating the birds, it also probably helps kill mites and other parasites that might otherwise want to live in their feathers.

A 2023 study on the birds’ toxins discovered something new. In addition to the neurotoxin the birds absorb from beetles, the regent whistler’s skin also contains a different toxin that doesn’t have anything to do with beetles or other insects. The regent whistler’s skin glands contain a population of symbiotic bacteria that secrete a completely different toxin made of previously unknown molecules. The toxin helps protect the birds from harmful bacteria and fungi that are known to infect the skin and feathers of birds.

In 2024, a team of microbiologists and chemists began studying the antimicrobial secretions in hopes of creating a new type of antimicrobial drug for use in humans and other animals. So thank you, little birds, and thank you to the scientists and citizen scientists who study them.

You can find Strange Animals Podcast 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 for as little as one dollar a month and get monthly bonus episodes.

Thanks for listening!