Category Archives: animals

Episode 386: The Greater Siren and the Anhinga

Posted on by

Podcast: Play in new window | Download (Duration: 10:11 — 11.9MB)

Subscribe: RSS | More

Thanks to Kai and Emily for their suggestions this week!

The greater siren [photo by Kevin Stohlgren, taken from this site]:

The anhinga [photo by Tim from Ithaca – Anhinga, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=15526948]:

An anhinga swimming [photo by Wknight94, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons]:

Show transcript:

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

This week we’re going to learn about two animals, one suggested by Kai and the other suggested by Kai’s mom Emily. It’s so awesome to hear when families like to listen to the podcast together. This episode even includes a mystery animal I bet you’ve never heard of.

Let’s start with Kai’s suggestion, the greater siren. The greater siren is an amphibian, specifically a salamander, but it’s probably not the kind of salamander you’re thinking of. For one thing, it can grow over three feet long, or about a meter, which is pretty darn big for a salamander. It’s dark green or gray in color with tiny yellow or green speckles, and while it has short front legs, those are the only legs it has or needs. It also has external gills which it keeps throughout its life, unlike most salamanders who lose their external gills when they metamorphose into adults.

The greater siren lives primarily in Florida, but it’s also found in coastal wetlands throughout much of the southeastern United States. It’s mostly nocturnal and during the day it hides among water plants or under rocks, and will even burrow into the mud. At night it comes out to find food, which includes crayfish and other crustaceans, insects and spiders, little fish, other amphibians, snails, and even algae. It swallows its food whole, even snails and other mollusks. It poops out the shells and other undigestible pieces.

The grater siren’s body is long but thin, sort of like an eel, with a rounded tail that’s slightly flattened to help it swim. While it does spend its whole life in the water, it has small lungs that allow it to breathe air if it needs to. It can wriggle above ground for short distances if it needs to find a new pond or river, and sometimes it will sun itself on shore. In drought conditions when its water dries up, the greater siren will burrow into the mud and secrete mucus that mixes with dead skin cells to form a sort of cocoon. The cocoon covers everything but the siren’s mouth, so it can still breathe. Then it enters a state of torpor called aestivation, and it can stay in its mud cocoon for a long time, possibly as much as five years, and still be fine once the water returns. It does lose a lot of its body fat and its gills wither away, but it regenerates them quickly once it has water, and will gain weight quickly too once it has food.

In early spring, the female siren lays her eggs in shallow water. The male fertilizes them and takes care of them for the next two months, when they hatch into little bitty sirens that go off on their own right away.

The greater siren has tiny eyes and probably doesn’t see very well. It has a good sense of smell instead, and it can also sense movement and vibrations around it with its lateral line system. This is an organ found in many fish and a lot of larval amphibians, although the greater siren retains it throughout its life. It allows the animal to sense the movement of water in extremely fine detail. The greater siren can probably also sense electrical impulses, which is something that all animals generate when they use their muscles.

If there’s a greater siren, you may be thinking, there must be a lesser siren too. There is, and it’s very similar to the greater siren, just not as big. It only grows about two feet long at most, or 61 cm.

Kai mentioned that the greater siren looks a lot like the axolotl, a critically endangered salamander found only in Mexico. I checked to see if the two salamanders were closely related and was actually surprised to find that they’re not. They’re both salamanders and therefore share the same order, but that’s all. The greater siren and its close relations do share one important trait with the axolotl, though, which is neotony. Neotony is when an adult organism retains juvenile traits, which in the case of the salamander means it retains gills and lives underwater as an adult.

Next, Emily wanted to learn more about a bird called the anhinga. It’s sometimes called the snakebird because it has a long, serpentine neck. But before we learn about the anhinga, let’s learn about a mystery animal from Kentucky. I promise this will make sense in a minute.

In 1993 a man named Barton Nunnelly and his wife were sitting in their back yard in Stanley County, Kentucky. It was a nice day and their house was close to the Ohio River, so as they often did they just relaxed and watched the river. On this particular day, they both noticed a strange animal in the water. It was snake-like with a bill similar to a duck’s, but it obviously wasn’t a duck. It swam with its head and neck above the water, but its body was never visible. It frequently sank into the water, then surfaced elsewhere. The couple watched the animal for half an hour before it disappeared downstream.

For most people, that sighting would just be an interesting story to tell at parties, but Barton Nunnelly was a cryptozoologist. That’s someone who likes to investigate mystery animals, and while it’s a great word, it’s not an official branch of science. Zoologists, biologists, and other scientists study mystery animals all the time as part of their jobs. Nunnelly investigated—and in fact still does investigate, since he’s alive and well—mystery animals that are a lot more mystery than animal, like Bigfoot. He wrote about his sighting of what he thought might be a young freshwater sea serpent in his book Mysterious Kentucky.

Now, with Nunnelly’s sighting in mind, let’s return to the anhinga and learn a little more about this unusual bird. It can grow almost three feet in length, or about 90 cm, with a nearly four-foot wingspan, or 115 cm. A lot of its body length is due to the long neck. The male is black all over with a white tail-tip, while the female looks similar but has a brown head and neck. It looks similar to the double-crested cormorant, a close relation, but it has a longer, sharper bill. It lives throughout much of South and Central America, and is also common around the Gulf of Mexico and parts of the southeastern United States. In North America it usually stays near the coast or around wetlands, but sometimes it’s found farther inland, especially along rivers.

The most interesting feature of the anhinga is the way it hunts. It has big webbed feet and swims extremely well, and it hunts fish, frogs, and other small animals underwater. Unlike other water birds, which have water-repellent oils coating their feathers, as soon as the anhinga gets in the water, its feathers get all wet. This causes it to lose buoyancy and sink, but that’s just fine with the anhinga. It also has dense bones compared to most birds, which helps it stay underwater. The bird swims underwater until it gets close to a fish or other prey animal. Then it stabs the animal with its sharp bill, before bringing it above water to swallow. Often it will swim with its body completely submerged but its head and neck sticking up out of the water.

One interesting fact about the anhinga is that it has no nostrils. It can only breathe through its mouth. It can hold its breath underwater for about four minutes and during that time can travel quite a distance, up to about 100 yards, or 90 meters, completely underwater. In addition to fish and frogs, it will eat crayfish, crabs, insects, water snakes, and lots of other small animals. After it’s done hunting, or if it wants a rest, it will stand in the sun with its wings spread in order to dry its feathers. Cormorants do this too for the same reason.

Now, think back to Barton Nunnelly’s sighting of a duck-billed water serpent. It sounds to me an awful lot like Nunnelly saw an anhinga hunting in the river. It’s a rare visitor that far inland, but not unheard of. Naturally, not everyone knows every single bird in the world, but I feel like if you’re going to write a book about mystery animals, you should do a little research first. But maybe that’s just me.

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 385: More Monitors

Posted on by

Podcast: Play in new window | Download (Duration: 9:18 — 10.3MB)

Subscribe: RSS | More

Thanks to Cosmo and Zachary for suggesting this week’s monitor lizards!

Further reading:

No One Imagined Giant Lizard Nests Would Be This Weird

The Mighty Modifications of the Yellow-Spotted Goanna

The Asian water monitor:

A yellow-spotted goanna standing up [picture by Geowombats – https://www.flickr.com/photos/geowombats/136601260/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=2595566]:

Show transcript:

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

Last week we had our big dragons episode where we learned about the Komodo dragon and some of its relations, including goannas. I forgot to thank Cosmo for suggesting the lace monitor, also called the tree goanna, in that episode, and I also forgot that Zachary had also suggested monitor lizards as a topic, so let’s learn about two more monitor lizards this week.

Cosmo is particularly interested in aquatic and semi-aquatic animals, and a lot of monitor lizards are semi-aquatic. Let’s learn about the Asian water monitor first, since it’s the second-largest lizard alive today, only smaller than the Komodo dragon.

The Asian water monitor is common in many parts of South and Southeast Asia, including India, Vietnam, Cambodia, Laos, southern China, and many islands. A half dozen subspecies are currently recognized, although there may be more.

The largest water monitor ever reliably measured was 10 1/2 feet long, or 3.2 meters. It’s dark brown or black with yellow speckles and streaks, and young lizards have larger yellow spots and stripes. It lives wherever it can find fresh or brackish water, from lakes and rivers to swamps, ponds, and even sewers.

Like the crocodile, the Asian water monitor’s tail is flattened from side to side, called lateral compression, and it’s also very strong. It swims by tucking its legs against its sides and propelling itself through the water with its tail. It can dive deeply to find food, and while it prefers fresh water, it will swim in the ocean too. That’s why it’s found on so many islands.

Juvenile Asian water monitors spend most of the time in trees, but even a fully grown lizard will sometimes climb a tree to escape danger. Only saltwater crocodiles and humans kill the adults.

In some parts of its range, the water monitor is killed by humans for its meat and its skin, which is used as leather. In other parts of its range, it’s never bothered since it eats venomous snakes and animals that damage crops. It’s sometimes kept as a pet, although it can grow so big that many people who buy a baby water monitor eventually run out of room to keep it. That’s how so many have ended up in the waterways of Florida and other areas far outside of its natural range, from people letting pets go in the wild even though doing so is illegal and immoral.

While most of the time the water monitor isn’t dangerous to humans, if it feels threatened, it can be quite dangerous. Like the Komodo dragon and other monitor lizards, it’s venomous, plus its teeth are serrated, its jaws are strong, and it has sharp claws. It eats a lot of carrion, along with anything it can catch. A population in Java even enters caves to hunt bats that fall from the ceiling.

Zachary didn’t suggest a particular type of monitor lizard, so let’s learn about the yellow-spotted goanna. Goannas are a type of monitor lizard found in Australia, New Guinea, and some nearby areas. We talked about some of them last week, including Cosmos’s suggestion of the lace monitor, but after the episode was released I found an article I had saved over a year ago. It’s about the yellow-spotted goanna, and a remarkable discovery about how it takes care of its eggs.

The yellow-spotted goanna lives in parts of Australia and southern New Guinea, and a big male can grow up to five feet long, or 1.5 meters. It can swim and climb trees when it wants to, but mainly it stays on the ground, although it prefers to live near water if possible. It’s a fast runner and chases its prey instead of ambushing it. It eats small animals like rodents, birds, fish, insects, and reptiles, including other monitor lizards.

If you remember last week’s episode, the female tree goanna digs a hole into a termite nest to lay her eggs inside. The termites repair the hole in their nest, which means the eggs are nicely hidden from predators and protected from weather, and when the babies hatch they have lots of termites to eat. That’s weird enough, but the yellow-spotted goanna female has an even more interesting way of protecting her eggs.

The yellow-spotted goanna digs a big burrow to hide in, and it spends a lot of its time in the burrow when it’s not out hunting. Researchers assumed the female laid her eggs in the burrow, but every time they investigated a female’s burrow, it was empty.

In 2012, a herpetologist named Sam Doody hoped to figure out where the female hid her eggs. He thought the eggs might be buried inside the burrow. When a female left her burrow, he and his team examined the burrow carefully. Doody noticed that the dirt at the end of the burrow felt softer than the walls, and he dug into it carefully, convinced he would find the eggs right away.

Instead, he and his team kept digging, following the softer dirt. It took them hours and hours, since they had to be really careful, and the filled-in burrow just kept going. It descended five feet, or 1.5 meters, into the ground in a corkscrew shape, more properly called helical, and at the very bottom the team found a nest of ten eggs.

Since then, Doody and his colleagues have studied many other yellow-spotted goanna nests and they’re all helical in shape and as much as 13 feet deep, or 4 meters. The extreme depth is related to how long it takes the eggs to hatch, about 8 months. If the eggs were closer to the surface, they would get too hot and dry to hatch. There’s more moisture and a constant temperature deep underground.

It takes the female more than a week to dig her tunnel and the small nesting chamber at the bottom. She lays her eggs, then returns to the surface, letting the sandy soil collapse behind her to hide and protect the eggs. The females also frequently nest together, sometimes sharing a nesting chamber. Doody’s team once found a nesting chamber as big as a room of your home but only about as tall as a mattress, with more than 100 clutches of eggs laid in it. The females often re-use the same burrows year after year. When the eggs hatch, the baby lizards dig their way out of the nesting chamber–but they dig straight up instead of using the softer parts of the helical structure.

Other animals move into the loose soil of the nesting burrows, especially frogs. When excavating one burrow, Doody’s team found 418 frogs, along with numerous small reptiles, invertebrates, and even mammals, all of them spending the dry season comfortably inside the loose soil in the spiral burrow. I wonder if the mother lizard sometimes digs some of these frogs out to eat as a snack. Watch out, frogs!

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 384: Dragons Revisited

Posted on by

Podcast: Play in new window | Download (Duration: 15:30 — 18.2MB)

Subscribe: RSS | More

This week we need to thanks a bunch of listeners for their suggestions: Bowie, Eilee, Pranav, and Yuzu!

Further reading:

Elaborate Komodo dragon armor defends against other dragons

Giant killer lizard fossil shines new light on early Australians

A New Origin for Dragon Folklore?

The Wyvern of Wonderland

The Komodo dragon:

The beautiful tree goanna:

The perentie:

Fossilized scale tree bark looks like reptile scales:

Show transcript:

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

This week we’re going to revisit a popular topic we talked about back in episode 53. That episode was about dragons, including the Komodo dragon. Since then, Bowie has requested to learn more about the Komodo dragon and Eilee and Pranav both suggested an updated dragon episode. We also have a related suggestion from Yuzu, who wants to learn more about goannas in general.

We’ll start with the Komodo dragon, which gets its name because it’s a huge and terrifying monitor lizard. It can grow over 10 feet long, or 3 meters, which means it’s the biggest lizard alive today. It has serrated teeth that can be an inch long, or 2.5 cm, and its skin is covered with bony osteoderms that make it spiky and act as armor. Since the Komodo dragon is the apex predator in its habitat, it only needs armor to protect it from other Komodo dragons.

Fortunately for people who like to hike and have picnics in nature, the Komodo dragon only lives on four small islands in Indonesia in southeast Asia, including the island of Komodo. Young Komodo dragons have no armor and spend most of the time in trees, where they eat insects and other small animals. As the dragon gets older and heavier, it spends more and more time on the ground. Its armor develops at that point and is especially strong on the head. The only patches on the head that don’t have osteoderms are around the eyes and nostrils, the edges of the mouth, and over the pineal eye. That’s an organ on the top of the head that can sense light. Yes, it’s technically a third eye!

The Komodo dragon is an ambush predator. When an animal happens by, the dragon jumps at it and gives it a big bite from its serrated teeth. Not only are its teeth huge and dangerous, its saliva contains venom. It’s very good at killing even a large animal like a wild pig quickly, but if the animal gets away it often dies from venom, infection, and blood loss.

Like a lot of reptiles, the Komodo dragon can swallow food that’s a lot bigger than its mouth. The bones of its jaws are what’s called loosely articulated, meaning the joints can flex to allow the dragon to swallow a goat whole, for instance. Its stomach can also expand to hold a really big meal all at once. After a dragon has swallowed as much as it can hold, it lies around in the sun to digest its food. After its food is digested, which can take days, it horks up a big wad of whatever it can’t digest. This includes hair or feathers, horns, hooves, teeth, and so on, all glued together with mucus.

A Komodo dragon eats anything it can catch, and the bigger the dragon is, the bigger the animals it can catch. One thing Komodo dragons are just fine with eating are other Komodo dragons.

As we mentioned a few minutes ago, the Komodo dragon is a type of monitor lizard, and there are lots of monitor lizards that live throughout much of the warmest parts of the earth, including Australia. Yuzu suggested we talk about the goanna, which is the term for monitor lizards in the genus Varanus, although it’s also a term sometimes used for all monitor lizards. Goannas are more closely related to snakes than to other types of lizard.

Like the Komodo dragon, the goanna will eat pretty much any animal it can catch, and will also scavenge already dead animals. Smaller goannas mostly eat insects, especially the tiny goanna often called the short-tailed pygmy monitor or just the pygmy monitor. Its tail is actually pretty long for its size. It only grows about 8 inches long at most, or 20 cm, and babies are less than the length of your pinkie finger. It spends most of its time underground in a burrow, but comes out to hunt for grasshoppers and other insects, spiders, scorpions, and sometimes frogs and small snakes. Many species of goanna spend the hottest part of the day in a burrow, and some species will hibernate in winter.

Most goannas spend all their time on the ground unless they’re actually underground, but some live in trees. The tree goanna, also called the lace monitor or just lacy, can grow up to seven feet long, or over two meters, but is lightly built to climb around on tree branches looking for food. The tree goanna eats a whole lot of bird eggs, along with whatever animals it can catch in trees or on the ground. It eats a lot of carrion and will even get into trash cans if it smells food. When the female is ready to lay her eggs, she digs a hole in the side of a termite nest and lays them in the nest. The termites repair the hole, which hides the eggs, and when the babies hatch, they have lots of termites to eat. The mother goanna keeps watch on the termite nest and once her eggs hatch, she’ll dig into it again to let her babies out.

Genetic testing has discovered that the tree goanna is the closest living relative to the Komodo dragon, but another relative is the biggest goanna alive today in Australia. It’s called the perentie and it can definitely grow up to 8 and a half feet long, or 2.5 meters, and possibly close to 10 feet long, or 3 meters. That’s almost the length of the Komodo dragon.

Long as it is, the perentie isn’t very heavy for its size. It has big claws that allow it to dig quickly, so that if it feels threatened it can dig a burrow and hide in it in only a few minutes. It can also climb trees and is a fast runner. Sometimes it will rear up on its hind legs, propping itself up with its tail, to get a good look around. It’s covered with a maze-like pattern of spots and speckles, and it has a very long neck and a very long tail. Like most monitor lizards, its head is flattened so that it looks a little like a snake’s head. Also like other monitor lizards, it has a long forked tongue that it flicks in and out like a snake to detect the chemical signature of other animals nearby, sort of like smelling but with the tongue.

Also like other monitor lizards, the perentie has a venomous bite. Its venom isn’t all that strong, but you still wouldn’t want to get nipped by one. A big perentie will kill and eat just about anything it can catch, including wombats and small kangaroos. It’s not dangerous to humans, though, and in fact very few people in Australia have ever seen a perentie in the wild. It’s shy and lives in remote areas, mostly in the interior of the country over to the western coast.

There used to be a goanna in Australia that was even bigger than the perentie, but it went extinct around 50,000 years ago. We talked about it briefly in episode 325, but Pranav suggested we learn more about it. It’s called megalania and not only was it bigger than the perentie, it made the Komodo dragon look like a little baby lizard. Megalania may have grown as much as 23 feet long, or 7 meters, although most scientists these days think it wasn’t quite that big. The latest estimates are still pretty big, possibly 18 feet long, or 5.5 meters. It was also heavily built, more like the Komodo dragon than the perentie, so it may have weighed as much as a polar bear. That’s about 1200 pounds, or around 550 kg, but I thought the polar bear comparison was funny. We don’t know for sure how big megalania was because we don’t have a complete skeleton.

Megalania has been classified with the living goannas in the genus Varanus, so it was probably related to the Komodo dragon, although we don’t know exactly how closely. It was probably venomous, and we know its teeth were serrated like the Komodo dragon’s. It lived throughout much of eastern Australia and may have been even more widespread, we just don’t know because we don’t have very many fossils.

Megalania lived alongside another giant monitor lizard in what is now Queensland, the Komodo dragon. That’s right, the Komodo dragon once lived in Australia, although it went extinct there around 300,000 years ago. Megalania went extinct around the time that humans first arrived in Australia, so it’s very possible that the ancestors of today’s Aboriginal Australians encountered it. In 2015, a study was published detailing the discovery of a large goanna osteoderm from a cave system in Queensland. The osteoderm has been dated to about 50,000 years ago and probably belonged to megalania, and some scientists think humans may have been a factor in its extinction, along with climate change.

There are supposedly stories passed down for thousands of years among the Aboriginal Australian peoples that suggest meetings with megalania. I tried hard to find accounts of any of these stories to share, but the sources were always questionable. I did learn that European accounts of the Dreamtime, especially older ones, are inaccurate at best. European colonizers didn’t fully understand the Aboriginal cultures and in many cases weren’t interested in understanding them. They just wanted to collect stories that they would then change to fit the European worldview. This trend continues to the present day, with non-Aboriginal writers changing, misinterpreting, or even straight up inventing Dreamtime stories to fit their own interests. Sometimes that interest is cryptozoology. From what I was able to discover, there really is one aspect of the Dreaming that does apparently include a giant goanna, but that the traditions involved are especially sacred and not meant for outsiders to learn. So it’s none of our business.

As we discussed in episode 53, European stories about dragons were probably inspired by snakes, since early dragons were described as snake-like. Dragon stories in other parts of the world were probably inspired by various local reptiles such as crocodiles. Fossilized bones also played a part, since in the olden days no one knew what dinosaurs were. All anyone knew was that sometimes they found gigantic bones that seemed to be made of stone, and people made up stories to explain them.

Stories about giant reptiles are common throughout much of the world, and in 2020 a study was published suggesting that one of the reasons wasn’t an animal at all. It was a plant, specifically a 300 million year old plant called Lepidodendron, also called the scale tree.

The scale tree wasn’t actually a tree, but it was a really big plant that could grow 160 feet tall, or 50 meters. It’s been extinct for a long time, but it does have living relations called quillworts that kind of look like weird grass.

The scale tree gets its name from the diamond-shaped pattern on its trunk, which looks for all the world like reptile scales. These were just places where leaves once grew, but as the plant got taller, it shed its lower leaves as new ones grew from the top. Different species of the plant had different scale patterns. The study suggests that fossilized pieces of scale tree trunks inspired stories about giant reptiles. Since the plants grew throughout the supercontinent Pangaea and often ended up fossilized in coal beds, their fossils have been found in many different parts of the world.

Let’s finish with a dragon story from England, specifically the village of Sockburn in County Durham. It’s referred to as the Sockburn Worm, since “worm” used to mean any creature that was snakey or worm-shaped in appearance. It’s closely related to the story of the Lambton Worm that we talked about in episode 53.

Once upon a time in the olden days, maybe around 750 years ago, maybe longer ago, Sockburn and the farmland around it were terrorized by a dragon. The dragon had a poisonous breath and would eat anyone it came across, and killed and ate all the livestock it could find. No one could kill it.

Sir John Conyers was a knight who lived in the area and he decided he had to do something. He got dressed in his armor and went to the local church to pray, and said he would give up his only son’s life if it meant killing the dragon. Then he set out to find the dragon.

He didn’t so much find the dragon as the dragon found him. Instead of getting eaten, Sir John drew his magical sword and battled the dragon until finally he lopped its head off with one massive chop. Sir John survived and so did his son.

Centuries later, in 1855, a writer was inspired by the story and wrote a poem based on it. He eventually included the poem in a book called Alice Through the Looking-Glass, the sequel to Alice in Wonderland. You may know the poem “The Jabberwock,” and now you know the dragon story that inspired 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 383: The Marsupial Mole

Posted on by

Podcast: Play in new window | Download (Duration: 6:33 — 7.3MB)

Subscribe: RSS | More

Thanks to Catherine and arilloyd for suggesting the marsupial mole!

Further reading:

Northern marsupial mole: Rare blind creature photographed in Australian outback

The marsupial mole, adorable little not-mole from Australia [photo from article above]:

Grant’s golden mole, adorable little not-mole from Africa:

Show transcript:

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

This week we have a little short episode about a very small Australian animal suggested by two listeners: Catherine, who has the best name ever, and someone called arilloyd who left us a nice review and suggested this animal in the review. I’m not sure I’m pronouncing their name right, so apologies if not. The animal is the unusual but very cute marsupial mole.

There are two closely related species of marsupial mole, one that lives farther north than the other. They look very similar, with silky golden fur, strong, short legs with strong claws for digging, a very short tail, no external ears, and no eyes. The marsupial mole doesn’t have eyes at all. It doesn’t need eyes because it spends almost its entire life underground.

All this sounds similar to other moles, but the marsupial mole isn’t related to other moles. Other moles are placental mammals while the marsupial mole is a (guess, you have to guess), right, it’s a marsupial! That means its babies are born very early and crawl into the mother’s pouch to finish developing. The marsupial mole has two teats, so it can raise two babies at a time.

The marsupial mole grows around 6 inches long, or about 16 cm, and is a little chonky animal with a pouch that faces backwards so sand won’t get in it. It has a leathery nose and small teeth, and its front feet are large with two big claws.

We actually don’t know very much about the marsupial mole because it’s so seldom seen. Not only does it live underground, it lives in the dry interior of Australia, the Great Sandy Desert. It probably also lives in other desert areas of Australia.

Scientists think the marsupial mole originally evolved to dig not in desert sand but in the soft, wet ground in rainforests. Over millions of years Australia became more and more dry, until the rainforests eventually gave way to the current desert conditions. The marsupial mole had time to adapt as its environment changed, and now it’s extremely well adapted to living in sand. It sort of swims through the sand using its big paddle-shaped front feet, kicking the sand behind it with its back legs. Unlike other moles, the marsupial mole doesn’t dig permanent tunnels and the sand just collapses behind it.

While the marsupial mole can’t see, and probably doesn’t have great hearing by our standards, it does have a good sense of smell in order to sniff out insect eggs and larvae, worms, and other small, soft food. It probably searches mainly for insect nests where it can find lots of food at one time, like ant nests. There are also reports of it eating adult insects, seeds, and even small lizards.

The reason the marsupial mole looks and acts so much like placental moles is due to convergent evolution. The mole’s body shape and habits just work really well for an animal that wants to dig around and eat grubs. Like other moles, it has trouble regulating its body temperature since most of the time it doesn’t need to do so. If it gets too hot, it can dig deeper into the sand where it’s cooler.

The marsupial mole is most similar to a completely unrelated placental mammal, Grant’s golden mole, which lives in a few parts of coastal South Africa and Namibia in Africa. Grant’s golden mole lives in sandy areas and swims through the sand like the marsupial mole does. It mainly eats termites and other insects, but it will also eat small reptiles. Its fur is a sandy golden color and it has no external ears, no eyes, and three big claws on its front feet. It only grows about 3 and a half inches long, or 9 cm, which makes it the smallest golden mole. It’s nocturnal and emerges from the sand at night, often hunting aboveground to conserve energy. It mostly hunts by hearing, but since its ears are most effective when it’s underground, it will often stop and stick its head into the sand to listen for potential prey.

Other golden moles are a little bit larger and live in different parts of Africa in different environments, from forests to swamps. But while golden moles are placental mammals, they’re not actually moles despite the name. They look and act like moles, but they’re actually more closely related to the tenrec, which we talked about in episode 324. The golden mole just shares the same traits as true moles due to convergent evolution again.

Just like water animals that all eventually develop a fish-like body shape, it seems that all digging mammals eventually develop a mole-like body shape. That shape also happens to be really cute, which is just a little extra bonus for the animal.

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 382: Smilodon, the Sabertoothed Cat

Posted on by

Podcast: Play in new window | Download (Duration: 8:57 — 10.6MB)

Subscribe: RSS | More

Thanks to Luke for suggesting this week’s topic: Smilodon, the saber-toothed cat, AKA the sabertooth tiger!

Further reading:

Did sabertooth tigers purr or roar?

The double-fanged adolescence of saber-toothed cats

We don’t know for sure what Smilodon looked like, but it might have been something like this:

An artist’s rendition of an adolescent Smilodon with doubled fangs [picture from second link above]:

Show transcript:

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

This week we’re going to learn about an animal suggested by Luke, the sabertooth tiger, also called the sabertooth cat since it wasn’t actually a tiger, also called smilodon after its scientific name. We’ve talked about it before, way back in episode 34, but a lot of new studies have been published since then and we know a lot more about this terrifying-looking animal!

The genus of the saber-toothed cat is Smilodon, so that’s mostly what I’m going to call it in this episode. It’s classified as a member of the family Felidae, which is the same family where you find domestic cats, wildcats, big cats, and lots of extinct animals like the cave lion, but Smilodon wasn’t closely related to what we think of as cats. There were at least three species of saber-tooth cats in the genus Smilodon that we know of, but it had many other similar-looking relatives.

Smilodon is best known from the La Brea tar pits in Los Angeles, California, where the remains of hundreds of individuals have been discovered. That’s a big reason why we know so much about Smilodon, especially the species Smilodon fatalis that lived in North America and parts of South America. An even bigger species lived exclusively in South America, while both were probably descended from a smaller species that also lived in South America.

S. fatalis is estimated to have grown up to 39 inches tall at the shoulder, or 99 cm, while S. populator stood at an estimated 47 inches tall, or 119 cm. That’s almost four feet tall. Some full-grown humans are that height! Smilodon was so stocky and heavily muscled that it probably looked more like a bear than a cat. Its had a broad head and jaws that could open much wider than most modern animals, which allowed it to deploy its most deadly weapon, its saber teeth, without its jaw getting in the way.

Smilodon’s saber teeth were as much as 11 inches long, or 28 cm, although S. fatalis typically had teeth around 8 inches long, or 20 cm. Big as they were, the saber teeth were also relatively delicate. A young Smilodon didn’t start growing its big teeth until it was about a year old, and even then it had to learn how to use them so they wouldn’t break. Luckily for adolescent smilodons, they didn’t lose their baby fangs until they were fully grown.

Most mammals only grow two sets of teeth in our lifetimes. The first set is usually called baby teeth or milk teeth. As the baby grows up, its adult teeth start growing in one at a time. The adult tooth pushes at the baby tooth until it gets loose and either comes out on its own or, in the case of me in second grade, I asked to go to the bathroom and then spent half an hour twisting at a loose baby tooth until it finally came out, along with some blood. But I got a quarter that night from the tooth fairy. (Kids, maybe don’t do that.)

In the case of a young smilodon’s saber teeth, they grew in just next to the baby fangs. Instead of pushing the baby fangs out, the new teeth grew alongside them and even had a groove for the baby teeth to fit into. When scientists first discovered preserved jaws with these double fangs, they thought it was a fluke, that sometimes the new teeth came in wrong and didn’t push the old teeth out. That happens in humans sometimes too and then you have to go to the dentist to get the old baby teeth taken out. But paleontologists kept finding these double toothed jaws, and only in adolescent smilodons.

Finally a team of scientists studied the teeth carefully and made a surprising discovery. The baby fang stayed in place next to the saber tooth until the animal was about two and a half years old, at which time the baby fang finally fell out. In early 2024 the team published their study, which concluded that these double teeth acted sort of like a set of training wheels. Training wheels on a bicycle keep a new rider from tipping over sideways, and the doubled fangs kept the saber teeth from getting bent sideways until they broke. By the time the baby fang fell out, the smilodon had lots of experience hunting properly and no longer needed training wheels.

Smilodon legs are relatively short, which suggests it didn’t do a lot of running after prey. It was probably an ambush hunter and may have hunted in groups, sort of like lions do today. Some scientists think that instead of big groups, smilodon lived in small family groups of a mated pair and their offspring, which they took care of for several years. There’s even some evidence that adult animals with debilitating injuries or congenital issues that meant they couldn’t hunt were taken care of by other adults.

Smilodon ate large animals like ground sloths, horses, deer, camelids, and glyptodonts. It went extinct about 11,000 years ago, the same time that a lot of its prey went extinct too. We don’t know what color it was, but modern cats that hunt in forested areas generally have spots while cats that hunt in open areas generally have plain coats. Since smilodon lived in a variety of habitats, from forests to deserts, its coat pattern and coloration may have varied from region to region. It also had a short tail like a bobcat instead of a long tail like most modern cats.

Let’s finish with one last important detail about smilodon. Did it purr or did it roar? Remember that modern cats can either do one or the other, not both. A tiger can’t purr, while a wildcat can’t roar. In modern cats, the difference appears to be due to the number of hyoid bones in the throat. Humans have a single hyoid bone, which anchors the larynx in place, but cats have a whole row of them. Cats that can roar have seven of these tiny bones, while cats that can purr have nine of them.

Smilodon had seven hyoid bones. Therefore, scientists assumed, smilodon could roar but not purr. But a study from 2023 suggests it’s not that simple. The hyoid bones in purring cats are shaped differently from those in roaring cats. Smilodon only had seven hyoid bones, but some of them were shaped like really big purring hyoid bones, big even for the animal’s large size. Scientists aren’t sure if that means smilodon was able to purr in a deep register, if it could roar instead but with a really deep voice compared to modern cats, or if it made some other sound that we can’t even guess at.

In other words, I’m sorry, we don’t know if smilodon roared or purred, and we probably won’t know for sure until someone invents a time machine. Personally, I like to think that smilodon could purr and roar, and that it could also meow, but in a really deep voice. MEOW.

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 381: Out of Place Birds

Posted on by

Podcast: Play in new window | Download (Duration: 12:42 — 14.2MB)

Subscribe: RSS | More

Thanks to Richard from NC, Pranav, and Alexandra for their suggestions this week!

Further reading:

ABA Rare Bird Alert

One Reason Migrating Birds Get Lost Is Out of This World

Inside the Amazing Cross-Continent Saga of the Steller’s Sea-Eagle

A Vagrant European Robin Is Drawing Huge Crowds in China

Bird migration: When vagrants become pioneers

A red-cockaded woodpecker:

Steller’s Sea Eagle making a couple of bald eagles look small:

Steller’s sea eagle:

A whole lot of birders showed up to see a European robin that showed up in the Beijing Zoo [photo from the fourth article linked above]:

A robin:

Mandarin ducks:

Richard’s pipit [photo by JJ Harrison (https://www.jjharrison.com.au/) – Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=23214345]:

Show transcript:

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

We’re talking about some birds again this week, with a slightly mysterious twist. These are birds that have shown up in places where they shouldn’t be, sometimes way way far from home! Thanks to Richard from NC for inspiring this episode and suggesting one of the birds we’re going to talk about, and thanks to Pranav for suggesting we cover more out of place animals.

Last week we talked about some woodpeckers, and I said I thought there was another listener who had suggested the topic. Well, that was Alexandra! Let’s start today’s episode talking about the red-cockaded woodpecker, another bird Alexandra suggested.

The red-cockaded woodpecker is native to the coastal southeastern United States, where it lives in pine forests. It’s increasingly threatened by habitat loss since the pine forests get smaller every year, and not only does it need old-growth pine forests to survive, it also needs some of the trees to be affected by red heart fungus. The fungus softens the interior wood, which is otherwise very hard, and allows a woodpecker to excavate nesting holes in various trees that can be quite large. The female lays her eggs in the best nesting hole and she and her mate raise the babies together, helped by any of their children from previous nests who don’t have a mate of their own yet. When they don’t have babies, during the day the birds forage together, but at night they each hide in their own little nesting hole to sleep.

It’s a small bird that doesn’t migrate, which is why Beth Miller, a birder in Muskegon, Michigan, couldn’t identify it when she spotted it on July 1, 2022 in some pine trees near a golf course. She took lots of photos and a recording of its calls, which she posted in a birding group to ask for help. She knew the bird had to be a rare visitor of some kind, but when it was identified as a red-cockaded woodpecker, she and nine birder friends went back to the golf course to look for it. Unfortunately, they couldn’t find the bird again. It was the first time a red-cockaded woodpecker had ever been identified in Michigan, although individual birds do sometimes wander widely.

While bird migration isn’t fully understood, many birds use the earth’s magnetic field to find their way to new territories and back again later in the year. Humans can’t sense magnetic fields but birds can, and being able to sense Earth’s magnetic field helps birds navigate even at night or during weather that keeps them from being able to see landmarks.

But sometimes birds get lost, especially young birds who have never migrated before or a bird that gets caught in storm winds that blow it far off course. If a bird shows up somewhere far outside of its normal range, birdwatchers refer to it as a vagrant, and some birders will travel great distances to see vagrant birds.

One interesting note is that birds navigating by the earth’s magnetic field can get confused if the magnetic field is disrupted by geomagnetic storms, including solar flares, sunspots, and coronal mass ejections. Very recently as this episode goes live, the aurora has been occasionally visible across much of the world. The aurora is caused by charged particles from the sun reaching Earth’s atmosphere, causing a colorful glow or shimmer in the night sky, and it’s usually only visible at or near the poles. This month it was visible in places far away from the poles. Fortunately, a really strong geomagnetic storm like the ones this month can actually make it easier for birds to migrate. Instead of getting a scrambled sense of the earth’s magnetic field, a strong geomagnetic storm can temporarily knock out a bird’s ability to sense the magnetic field at all, and that means it uses landmarks, the position of the stars and sun, and other methods to find its way.

Sometimes a bird just flies the wrong way, like the Steller’s sea eagle that showed up in Alaska at the end of August 2020. Steller’s sea eagle is native to the coast of northeastern Asia and is increasingly threatened due to habitat loss, pollution, climate change, poaching, and overfishing, a real problem if you’re an eagle that eats a whole lot of fish. Only about 4,000 of the birds remain in the wild. It’s a huge eagle, one of the biggest in the world, with a big female having a wingspan over 8 feet across, or almost 2.5 meters. Some unverified reports indicate birds with a wingspan over 9 feet across, or 2.8 meters. It has a huge yellow bill and feet, and is black and white in color. It’s related to the bald eagle but is larger and heavier, and its head is black instead of white.

To an eagle as big as Steller’s sea eagle, the distance between the eastern coast of Russia and the western coast of Alaska is very small, so it’s not all that unusual for birders to see one in Alaska. The difference in 2020 is that the bird was far inland, not on the coast. Then, several months later, a Steller’s sea eagle was reported in Texas. Texas! Very far away from Alaska and the northeastern Asian coast.

No one could definitively say if the Texas bird was the same one seen in Alaska, but a few weeks before there had been a massive storm that could have blown the eagle to San Antonio. It was the first time a wild Steller’s sea eagle had been spotted in Texas.

But the bird wasn’t done traveling. In late June 2021, a ranger in eastern Canada spotted the sea eagle. It was seen by multiple birders and photographers, some of whom got pictures good enough to compare to the Alaska photos from the year before, and it was the same bird! A few months later it was spotted in Nova Scotia, Canada, and in mid-December 2021 it arrived in southern Massachusetts in the United States for a few days. By the end of 2021 it was in Maine.

Since then the eagle appears to divide its time between Maine in the northeastern United States and Newfoundland, Canada, not too far away.

Richard from NC suggested that sightings of Steller’s sea eagle might explain the mystery of Washington’s eagle. I go into detail about Washington’s eagle in the Beyond Bigfoot & Nessie book. There is a rare color morph of Steller’s sea eagle that is almost all black, which matches Audubon’s painting of Washington’s eagle, but Steller’s sea eagle always has a yellow bill, not a dark one as Audubon painted. Still, it’s a very interesting theory that matches a lot better than the theory that Washington’s eagle is just a big juvenile bald eagle.

Eagles are spectacular birds, but even an ordinary bird turns into a celebrity when it shows up somewhere far outside of its normal range. That’s what happened to a European robin at the beginning of 2019. We talked about the European robin back in episode 333. It’s a common bird throughout much of Europe and parts of Asia, but it’s only been documented in Beijing, China three times. The third time was when one showed up in the Beijing Zoo in 2019, at least 1,500 miles, or 2,400 km, away from its usual range. Birdwatching is an increasingly popular hobby in China, and hundreds of birders showed up at the zoo not to see the animals it has on display but to see a little robin that someone in England would barely glance at.

A few months before that, on the other side of the planet, a Mandarin duck showed up in Central Park in New York City. Birders showed up soon after to look at it. The Mandarin duck is a beautiful bird related to the wood duck native to North America, but it’s native to China and other parts of east Asia. The male has a red bill, rusty red face with white markings, and purplish feathers on his sides, while the female is softer and more muted in color. Both males and females have a purplish crest and the male also has a reddish crest on both of his wings that sticks up like a sail when his wings are folded.

In other words, the male in particular is a spectacular duck, and the duck that showed up at Central Park was a male in full breeding plumage, looking his best. Since Mandarin ducks are so attractive and increasingly threatened in the wild, many zoos and private owners keep them, and the Central Park duck did have a band on his leg that indicates he might have been an escaped bird. But no one ever claimed him and in March of 2019 he flew off for good.

Vagrant birds show up in weird places all the time, especially in spring and fall when most migratory birds are on the move. Sometimes a vagrant bird returns to the mistaken area in following years, brings its mate and offspring, and essentially founds a new migratory route. This is what scientists think has happened with several species of songbird that breed in Siberia and migrate to southeast Asia for the winter.

Richard’s pipit is a medium-sized songbird with long legs, a long tail, and a relatively long bill. It’s mainly brown and black, with lighter underparts. It looks like a stretched-out sparrow. It migrates to southern Siberia, Mongolia, and a few other parts of central Asia to nest during the summer, and flies back to India and other parts of southeast Asia to spend the winter. But a small population flies west instead of south and spends the winter in Spain, Italy, and surrounding areas instead of in India.

For a long time scientists thought the birds seen in Europe were just lost. They’re still quite rare in Europe compared to their high population in Asia. Then a team of scientists caught 81 of the birds, installed leg-bands on all of them and GPS loggers on seven of them, and released them again. The birds migrated north to breed, then returned to Europe instead of Asia to spend the winter, where some were caught again and their leg-bands recorded. So just remember that when a bird shows up where it’s not expected, it might not be as lost as people think.

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 380: Woodpeckers

Posted on by

Podcast: Play in new window | Download (Duration: 10:33 — 11.6MB)

Subscribe: RSS | More

Thanks to Joel and Mary for suggesting some really interesting woodpeckers this week!

Further watching:

Rare woodpecker thought extinct spotted in Ohio

The green woodpecker really likes to eat ants [picture by Remyymer – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=65008314]:

The white-headed woodpecker looks like its face got splashed with paint:

The red-headed woodpecker has the prettiest shade of red [picture by colleen – originally posted to Flickr as Red Headed Woodpecker, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=6639146]:

The acorn woodpecker looks like it got its face splashed with white paint and then dipped its beak in black paint [picture by Charles J. Sharp – Own work, from Sharp Photography, sharpphotography.co.uk, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=136903489]:

Show transcript:

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

This week we’re going to talk about a type of bird that several people have suggested, the woodpecker! Thanks to Joel and Mary for their suggestions, and I could swear someone else suggested woodpeckers a while back. If that was you, thank you and I’m sorry I didn’t write it down!

It’s funny that we haven’t talked about woodpeckers very often, because they are definitely strange animals. How many animals use their head to hammer holes in wood? The woodpecker has a strong, heavy bill that it uses to drill holes in trees to find hidden insects and other invertebrates. A lot of insects dig little burrows in wood, and the woodpecker hammers away at the wood until it exposes the burrow. Then it has to get the insect or grub out of the burrow without it getting away, so it has a long, sticky tongue with barbs at the end. It can stick its tongue into the burrow and use it to drag the insect out and eat it.

When I say woodpeckers have long tongues, I mean their tongues are way longer than you think. The woodpecker’s skull contains a special cavity that wraps all the way around the brain and back down to the right nostril, and this cavity is where the main part of the tongue is when the woodpecker isn’t actually using it. It also helps cushion the brain and keep it from moving too much while the woodpecker is pecking. The skull itself is lined with spongy bone to soften impacts too.

The woodpecker also has a lot of other adaptations to using its entire head like a hammer. To protect its eyes from debris and pressure damage, it has a thick membrane that it uses to cover the eye, like built-in safety goggles. It has tiny, tough feathers that protect the nostrils from debris, and its nostrils are usually very small and thin too. Even its skin is thicker than that of most birds.

Woodpeckers have weird feet too. Almost all species have four toes, two that point forward, two that point backward. This arrangement is called zygodactyly, and it’s a trait also found in parrots and some other birds, and in chameleons. It allows the woodpecker to climb trees and branches securely and easily. The woodpecker also has a relatively short tail with stiff feathers that it uses to prop itself up against a tree trunk while hammering.

The woodpecker doesn’t just use its hammering ability to find food. It also hammers to communicate with other woodpeckers, the same way other birds use song. Each species has its own pattern of drumming, and the sound can attract a mate or tell rivals that this territory is already taken. When it’s communicating, the woodpecker will drum on different surfaces than when it’s just looking for food. This might be a hollow tree that amplifies the sound, or even an artificial surface. The first time I observed this as a birdwatcher was when I noticed a red-breasted woodpecker hammering repeatedly on a metal light post.

Woodpeckers do make ordinary sounds, though. Mary suggested the European green woodpecker and pointed out that its old name is yaffle, which mimics its call. This is what the green woodpecker sounds like:

[green woodpecker call]

Birders still refer to the sound as yaffling, which is the funniest word I’ve said all day.

The green woodpecker is native to much of Europe and parts of Asia. It has a bright red head and a black mask on its face, and its body is mostly an olive green color with a yellow rump patch. It’s a large bird, with a wingspan up to 20 inches across, or 51 cm. It especially likes to eat ants and spends most of its time on the ground looking for them. When it finds an ant nest, it will use its bill to open the nest up and then it licks up all the yummy ants and larvae with its long sticky tongue. As an example of how long a woodpecker’s tongue is, the green woodpecker has a tongue 4 inches long, or 10 cm, while its entire body is 14 inches long, or 36 cm.

Unlike most woodpeckers, the green woodpecker doesn’t do a lot of drumming or woodpecking. When it does, it’s mostly on very soft or rotten wood, and it’s probably not looking for food but excavating a nest hole to lay eggs in. Its favorite habitat is open woodland, since it can nest and hide in the trees but find lots of ants on the ground.

Joel suggested we learn about the white-headed woodpecker. I’d never heard of that one before, probably because it only lives in mountainous pine forests in parts of the Pacific northwest of Canada and the United States. It’s a glossy black in color with a mostly white head and a streak of bright white on its wings. Males have a red head patch too. It mostly eats pine seeds, which are found in pine cones. The seeds are quite large and the white-headed woodpecker is relatively small, only about 9 inches long, or 23 cm.

It will take a pine seed, wedge it into a crevice in a tree, and break it into bite-sized pieces by hammering it. It also eats insects, but it mainly finds them under the bark of trees, and it will sometimes peck little holes into tree trunks and eat the sap that oozes out. Unlike pretty much every woodpecker known, the white-headed woodpecker’s tongue isn’t especially long, probably because it doesn’t need a long tongue to find pine seeds.

This is what the white-headed woodpecker sounds like:

[white-headed woodpecker call]

One of my favorite birds is the red-headed woodpecker, which has a vibrantly red head and a black and white body that almost looks checkered. It’s native to North America and lives year-round in much of the eastern and central United States, but for some reason it took me years as a birdwatcher before I saw one for the first time. I didn’t know just how beautiful it really is until I saw one in person. Red is my favorite color, and the red-headed woodpecker’s red head is my exact favorite shade of red.

The red-headed woodpecker is about the size of the white-headed woodpecker, or a little larger. It eats lots of insects but will also eat seeds, berries and other fruit, and even the eggs of other birds. It sometimes catches insects on the wing. It’s also one of only a few species of woodpecker that stores food, hiding it in crevices in trees or under the shingles of people’s houses. Occasionally when it catches too many grasshoppers to eat, it will wedge the living grasshoppers in crevices so tightly that the insect is stuck there until the bird comes back when it’s hungry. That’s disturbing.

Another bird that caches food is the acorn woodpecker, which lives in parts of southwestern North America down through Central America. It’s mostly black with white patches on the face and black and white streaks underneath. Males have a red patch on the back of the head too. As you probably guessed from its name, it eats a lot of acorns along with insects, fruit, and tree sap. Because acorns are seasonal foods, only available in the fall, the acorn woodpecker stores acorns to eat later in the year. It hides the acorns in holes and crevices, often pecking little holes in a tree specifically for storage, but as the acorns dry out they take up less space. The bird spends a lot of time throughout the year moving its acorns to better hiding spaces.

The acorn woodpecker lives in small flocks of up to about a dozen or 15 birds. All birds in the flock help raise any babies, and in years where there aren’t very many acorns, only a few of the females in the group will lay eggs. In years where there are lots of acorns, all of the females will usually lay eggs. They all lay their eggs in the same nesting cavity and the babies are raised together.

So why do so many woodpeckers have such bright colors and markings? Many are black and white, often with red or yellow markings on the head or neck. They look conspicuous to us, but the black and white patterning blends in with the pattern of light and shadow under trees. The bright spots of color help attract mates, since a bird with brightly colored feathers shows other birds that they’re healthy. In many species, only the male has a red patch, or the female’s red patch may be smaller than the male’s.

Way back in episode 9 we talked about the ivory-billed woodpecker and some of its close relations. The ivory-billed woodpecker was thought to be extinct but possible sightings and audio recordings indicate it may still be alive in remote areas of the southeastern United States. Most recently, video footage of a bird spotted in Ohio has the controversy starting up again. I’ve linked to the video in the show notes. The bird in the video is probably just the very similar-looking pileated woodpecker, but the light isn’t good so it’s hard to tell for sure. It’s just barely possible it might actually be an ivory-billed woodpecker. Let’s hope it is an ivory-billed.

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 379: Animals That Inspired Pokemon

Posted on by

Podcast: Play in new window | Download (Duration: 9:11 — 10.8MB)

Subscribe: RSS | More

Thanks to Pranav, Isaac, and an anonymous listener for their suggestions this week! Let’s learn about some animals that inspired three Pokemon.

Sandshrew:

Possible Sandshrew inspirations:

Drowzee:

Possible Drowzee inspiration:

Fennekin:

Undoubted Fennekin inspiration:

Show transcript:

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

This week we’re going to do something slightly different. At least two people and probably a lot more have suggested that we talk about some animals that were the inspiration for Pokemon, so I picked three that you might not know about. Thanks to Pranav and Isaac for their suggestions, and if you suggested the same topic at some point and I didn’t write it down, thank you too! Thanks also to an anonymous listener who suggested three of the animals we’ll talk about in this episode. I didn’t intend to cover three animals suggested by the same listener but it worked out that way, which is kind of neat.

Some of you may not be familiar with what Pokemon are. The word is a shortened version of the term “pocket monsters,” and it started as a video game where players catch various monsters and store them in little round cages called pokeballs. A lot of Pokemon are so cute you can’t really call them monsters, but they all have different abilities and can evolve into even more powerful versions with enough training. My only real experience with Pokemon is the game Pokemon Go that came out in 2016, although I don’t play it anymore, but the franchise has had multiple games, including a trading card game that is still really popular, TV shows, movies, and of course lots of toys.

Sometimes it’s easy to figure out what animal inspired a Pokemon. Rhyhorn obviously looks like a rhinoceros, Magikarp looks like a goldfish, and so on. But sometimes it’s not so obvious. Let’s start with Sandshrew.

Sandshrew is a sandy-brown color on its back with a lighter belly and muzzle, and prominent claws. Its tail is big and its ears are small. It’s covered with armor plates, and in some versions of Sandshrew, most notably the Pokemon TV show, it can curl up into a ball. What does that remind you of?

Some of you just said “armadillo” and others of you just said “pangolin.” Both were suggested a while back by an anonymous listener. The two animals aren’t related but they do share some physical similarities, like armored bodies and the ability to curl up into a ball to make their armor even more effective.

We talked about the pangolin in episode 65, about animals that eat ants. The pangolin is related to anteaters, and is sometimes even called the scaly anteater, but it’s not closely related to the armadillo. Their similarities are mainly due to convergent evolution.

The pangolin is a mammal, but it’s covered in scales except for its belly and face. The scales are made of keratin, the same protein that makes up fingernails, hair, hooves, and other hard parts in mammals. When it’s threatened, it rolls up into a ball with its tail over its face, and the sharp-edged, overlapping scales protect it from being bitten or clawed. It has a long, thick tail, short, strong legs with claws, a small head, and very small ears. Its muzzle is long with a nose pad at the end, it has a long sticky tongue, and it has no teeth. It’s nocturnal and lives in burrows, and it uses its big front claws to dig into termite mounds and ant colonies. It has poor vision but a good sense of smell. It’s a good fit for Sandshrew and some species are even the same color as Sandshrew. It lives in southern Asia and much of sub-Sahara Africa, and all species are critically endangered.

Meanwhile, the armadillo is also a mammal that’s covered in armor except for its belly, but its armor is much different from the pangolin’s scales. The armor is made up of bands of hardened, bone-like skin covered with scutes, which are tiny flattened knobs of keratin. Ordinary skin connects the bands so that the animal can move around more easily. Some species roll up when threatened, but others rarely do. Instead they just run into the most thorny, prickly plants they can find. The armadillo’s armor protects it from being hurt by the thorns. Like the pangolin, it has sharp claws and can dig well to get at termites and other invertebrates, and like the pangolin it has poor eyesight but a good sense of smell. Its ears are small, its legs are short, and its tail is long but not as thick as the pangolin’s. Most species are grayish, pinkish, or brownish. It looks less like Sandshrew than the pangolin does, but it might have contributed to Sandshrew’s appearance and habits.

The armadillo lives in the Americas, mostly in South America but also Central and parts of North America. Many species are endangered.

Whichever animal you think inspired Sandshrew, I think we can agree that Sandshrew doesn’t have anything to do with actual shrews.

Our next Pokemon is Drowzee. Drowzee is a chonky, strong-looking monster who looks like it’s wearing gray pants but otherwise has ochre yellow skin. Its nose is drawn out into a short proboscis like a miniature elephant trunk, and it has three pointy toes on its hands and what look like cloven hooves on its feet. It doesn’t have a tail.

Drowzee is inspired by the tapir, probably the Asian tapir. The other tapirs alive today live in South and Central America, but the Asian tapir lives in lowland rainforests in parts of south Asia. It’s mostly white or pale gray with black or dark gray forequarters and legs. It’s also the largest species of tapir alive today, standing more than 3 and a half feet tall at the back, or 110 cm. Like other tapirs, it spends a lot of time in water, eating plants and staying cool.

The tapir looks kind of like a pig but it’s actually much more closely related to horses and rhinos. It has four toes on its front legs, three on its hind legs, and each toe has a large nail that looks like a little hoof. It also has a rounded body with a pronounced rump, a stubby little tail, and a long head with a short but prehensile trunk called a proboscis. It uses its proboscis to gather plants, and it can even use it as a snorkel when it’s underwater.

The Asian tapir isn’t a perfect match for Drowzee, but its two-part coloration and short proboscis are pretty close. As far as I know, the Asian tapir doesn’t make you fall asleep and then eat your dreams like Drowzee is supposed to do, but that’s an aspect of a monster in Japanese folklore. The baku is supposed to eat nightmares and traditionally it’s often described as being black and white like a panda, but often with tapir-like traits.

Our last Pokemon today is Fennekin, who is based on the fennec fox, also a suggestion by an anonymous listener. Fennekin is yellow-brown in color with white on its face, a red-orange tip to its tail and red-orange tufts in its gigantic ears.

The fennec fox lives in northern Africa and parts of Asia. Its fur is a pale sandy color with a black tip to the tail. Its eyes are dark and its ears are large. It stands only about 8 inches tall at the shoulder, or 20 cm, but its ears can be six inches long, or 15 cm. It eats rodents, birds and their eggs, insects, and other small animals, as well as fruit. It can jump really far, some four feet in one bound, or 120 cm. Because it lives in desert areas, it rarely needs to drink water. It gets most of its water through the food it eats, and researchers think it may also lap dew that gathers in the burrow where it spends the day.

Fennekin is a fire Pokemon, appropriate since it’s based on a desert animal. It’s also extra adorable, and so is the fennec fox.

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 378: Ichthyotitan

Posted on by

Podcast: Play in new window | Download (Duration: 7:52 — 8.6MB)

Subscribe: RSS | More

Thanks to Nathan-Andrew for suggesting giant ichthyosaurs!

Further reading:

Paleontologists unearth what may be the largest known marine reptile

Ruby and some other scientists with the ichthyotitan fossils [photos taken from this page]:

How the pieces fit together:

Show transcript:

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

This week we’re going to learn about some of the biggest animals that have ever swum through the oceans of this planet we call Earth, a suggestion from Nathan-Andrew.

We talked about ichthyosaurs way back in episode 63, but we haven’t really discussed these giant marine reptiles since. Ichthyosaurs and their close relations were incredibly successful, first appearing in the fossil record around 250 million years ago and last appearing around 90 million years ago. Most ichthyosaurs grew around 6 and a half to 11 feet long, or 2 to 3.3 meters, depending on species, so while they were pretty big animals, most of them weren’t enormous. They would have been fast, though, and looked a lot like fish or dolphins.

Even though ichthyosaurs were reptiles, they were warm-blooded, meaning they could regulate their body temperature internally without relying on outside sources of heat. They breathed air and gave birth to live babies the way dolphins and their relations do. They had front flippers and rear flippers along with a tail that resembled a shark’s except that the lower lobe was larger than the upper lobe. Some species had a dorsal fin too. They had huge eyes, which researchers think indicated they dived for prey. Not only were their eyes huge, they were protected by a bony eye ring that would help the eyes retain their shape even under deep-sea pressures.

We know a lot about what ichthyosaurs ate, both from coprolites, or fossilized poops, and from the fossilized remains of partially digested food preserved in the stomach area. Most ichthyosaurs ate cephalopods like squid and ammonites, along with fish, turtles, and pretty much any other animals they could catch. Ichthyosaurs also ate smaller ichthyosaurs.

Nathan-Andrew specifically suggested we look at Shastasaurus and Shonisaurus, two closely related genera that belong to the ichthyosaur family Shastasauridae. Both genera contained species that were much larger than the average dolphin-sized ichthyosaur. The biggest species known until recently was Shonisaurus sikanniensis, which grew to almost 70 feet long, or 21 meters.

Scientists are divided as to whether S. sikanniensis should be considered a species of Shonisaurus or if it should be placed in the genus Shastasaurus. The main difference is that species in the genus Shastasaurus were more slender and had a longer, pointier rostrum than species in the genus Shonisaurus. Either way, S. sikanniensis was described in 2004 and at the time was the largest ichthyosaur species ever discovered.

But in May of 2016 a fossil enthusiast came across five pieces of what he suspected was an ichthyosaur bone along the coast of Somerset, England. He sent pictures to a couple of marine reptile experts, who verified that it was indeed part of an ichthyosaur’s lower jawbone, called a surangular. Studies of the fossil pieces compared it to S. sikanniensis, and it was similar enough that the new fossil was tentatively placed in the family Shastasauridae. Based on those comparisons, scientists estimated that this new ichthyosaur might have grown to around 72 feet long, or 22 meters, or even longer.

Almost exactly four years after the 2016 discovery, in May of 2020, an 11-year-old named Ruby Reynolds was looking for fossils with her father on the beach at Somerset. She discovered two big chunks of a fossil bone that she thought might be important. Ruby’s father contacted a local paleontologist, who in turn reached out to the man who had found and helped study the 2016 surangular bone. They studied the 2020 fossil and determined that it too was a surangular bone, and looked a lot like the one found in 2016. Not only was it better preserved and more complete, it was bigger.

Ruby and her father joined the team of paleontologists searching for more pieces of the surangular, and they actually found them. The pieces fit together like jigsaw puzzle pieces.

The bone has been dated as being about 202 million years old, from right before the end-Triassic extinction event and 13 million years after the other most recent ichthyosaur fossils from this era. It was described in early 2024 and named Ichthyotitan, and I’m happy to report that Ruby and her father helped with the research and are both included in the list of authors in the paper describing it. They also helped name it.

The estimated size of this specific Ichthyotitan specimen is about 25 meters, or 82 feet. That’s incredibly huge, rivaling the biggest whales alive today. But one other detail about this ichthyotitan bone is even more stunning. When the animal died, it was still growing. It hadn’t reached its full size yet.

As a comparison, the biggest animal ever known to have lived is the blue whale. A blue whale can grow up to 98 feet long, or 30 meters. Until now, scientists thought that no other animal had ever reached the size of a blue whale. Now, some paleontologists suspect that a full-grown ichthyotitan might have been at least as long or even longer than a blue whale.

The next step, of course, is to find more of the fossils. Ichthyotitan’s only fossils so far have been found in Somerset, England, but fossils of closely related ichthyosaurs have been found in parts of California, Nevada, British Columbia, China, Italy, Switzerland, and Tibet. In other words, they might be found just about anywhere with rocks dating to about 200 million years ago. The next time you’re out for a walk, keep a look-out just in case you spot a bone belonging to the biggest animal that ever lived.

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 377: The Giant-est Snake Ever

Posted on by

Podcast: Play in new window | Download (Duration: 7:42 — 8.5MB)

Subscribe: RSS | More

Thanks to Max for suggesting Titanoboa!

Further reading:

Largest known madtsoiid snake from warm Eocene period of India suggests intercontinental Gondwana dispersal

This Nearly 50-Foot Snake Was One of the Largest to Slither on Earth

Meet Vasuki indicus, the ‘crocodile’ that was a 50ft snake

Titanoboa had really big bones compared to its modern relatives:

Vasuki had big bones too:

Show transcript:

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

Almost exactly two years ago now, Max emailed to suggest we talk about titanoboa. The problem was that we had covered titanoboa in episode 197, and even though there’s always something new to learn about an animal, in this case since titanoboa is extinct there wasn’t much more I could share until new studies were published about it. But as the years passed I felt worse and worse that Max was waiting so long. A lot of listeners have to wait a long time for their suggested episode, and I always feel bad. But still there were no new studies about titanoboa!

Why am I telling you all this? Because we’re finally going to talk about titanoboa today, even though by now Max is probably old and gray with great-grandkids. But we’re only going to talk about titanoboa to compare it to another extinct snake. That’s right. Paleontologists have discovered fossils of a snake that was even longer than titanoboa!

Let’s start with Titanoboa, because it’s now been a really long time since episode 197 and all I remember about it is that it’s extinct and was way bigger than any snake alive today. Its discovery is such a good story that I’m going to include it too.

In 1994, a geologist named Henry Garcia found an unusual-looking fossil in Colombia in South America, in an area that had been strip-mined for coal. Fifty-eight million years ago the region was a hot, swampy, tropical forest along the edge of a shallow sea.

Garcia thought he’d found a piece of fossilized tree. The coal company in charge of the mine displayed it in their office along with other fossils. There it sat until 2003, when palaeontologists arranged an expedition to the mine to look for fossil plants. A researcher named Scott Wing was invited to join the team, and while he was there he poked around among the fossils displayed by the mining company. The second he saw the so-called petrified branch he knew it wasn’t a plant. He sent photos to a colleague who said it looked like the jawbone of a land animal, probably something new to science.

In 2007, the fossil was sent for study, labeled as a crocodile bone. But the palaeontologists who examined the fossil in person immediately realized it wasn’t from a crocodile. It was a snake vertebra—but so enormous that they couldn’t believe their eyes. They immediately arranged an expedition to look for more of them, and they found them!

Palaeontologists have found fossilized remains from around 30 individual snakes, including young ones. The adult size is estimated to be 42 feet, or 13 meters. The largest living snakes are anacondas and reticulated pythons, with no verified measurements longer than about 23 feet long, or 7 meters. Titanoboa was probably twice that length.

Because titanoboa was so bulky and heavy, it would be more comfortable in the water where it could stay cool and have its weight supported. It lived in an area where the land was swampy with lots of huge rivers. Those rivers were full of gigantic fish and other animals, including a type of lungfish that grew nearly ten feet long, or 3 meters. Studies of titanoboa’s skull and teeth indicate that it probably mostly ate fish.

So if titanoboa was so huge that until literally a few days ago as this episode goes live, we thought it was the biggest snake that had ever existed, how big was this newly discovered snake? It’s called Vasuki indicus and while it wasn’t that much bigger than titanoboa, estimates so far suggest it could grow almost 50 feet long, or over 15 meters. It’s named after a giant serpent king called Vasuki from Hindu folklore, who symbolizes strength and prosperity.

Vasuki indicus was discovered in a mine in India in 2005. The original discovery consisted of 27 vertebrae, including some that were still articulated. That means they remained in place after the rest of the body decayed and were preserved that way, which helps palaeontologists better estimate the snake’s true size.

Like titanoboa, the fossils were misidentified at first. They were labeled as a known giant crocodile and set aside in the discoverer’s lab for decades. In 2022, paleontologist Debajit Datta joined the lab, and one of the things he wanted to study were these giant crocodile fossils. He started preparing them for study by removing the rock matrix from around them, and almost immediately realized they belonged to a snake, not a crocodile.

The fossils have been dated to about 47 million years ago in what is now India, in Asia. Titanoboa lived about 58 million years ago in what is now Colombia, in South America. The two snakes are related, although not closely, and this helps scientists determine how snakes spread across the world as the continents moved into their current positions.

Both snakes lived in what were then very similar habitats, a tropical, swampy area near the coast. The researchers think Vasuki spent most of its time on land, unlike titanoboa. It wasn’t as bulky as titanoboa and could probably maneuver on land a lot more easily.

Until titanoboa was described in 2009, a snake called Gigantophis was thought to be the largest snake that ever lived. It lived around 40 million years ago in what is now the northern Sahara desert and could grow over 35 feet long, or almost 11 meters. It turns out that Vasuki was closely related to gigantophis.

As it stands now, until more fossils are found and more studies are conducted and published, Vasuki is estimated to be slightly longer than titanoboa at maximum, making it the longest snake known, but titanoboa is still estimated to be the heaviest snake known. So they both win the largest snake award, but the real winner is us.

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!