Category Archives: animals

Episode 256: Mammoths and the End of the Ice Ages

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Further reading:

Million-year-old mammoth genomes shatter record for oldest ancient DNA

Mammoth Genome Project (with pictures of cave art and ancient carvings of mammoths)

The most famous cave painting of a mammoth, from a cave in France:

Sivatherium:

Show transcript:

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

It’s the last Monday of 2021, which means the very last extinction event episode. There’ve been way more extinction events in earth’s long history than the five we’ve covered this year, and not all of the extinction events I chose to highlight were even necessarily the biggest. This one, for instance.

You may have noticed a pattern when I talk about ice age megafauna. So many animals went extinct about 11,000 years ago. That’s this week’s topic, the end-Pleistocene extinction event.

The Pleistocene is often called the ice age, or ice ages since it consisted of multiple glaciation periods separated by warmer times when the glaciers would retreat for a while. It started roughly 2.6 million years ago and is considered to have ended 11,700 years ago. Keep in mind, as always, that these dates are just a shorthand to help scientists refer to changes in earth’s history. There was no one day where the sun rose and everything had abruptly changed from one era to another. The changes took place over a long time, hundreds of thousands of years, with different parts of the world changing more quickly or slowly than others depending on local conditions.

At the beginning of the Pleistocene, the world’s continents were roughly in their present positions. Two continental plates in what is now Central America collided very slowly over millions of years, which caused the land to buckle up and magma to erupt through the earth’s crust as volcanoes. The volcanoes created islands in the Central American Seaway, a section of ocean between North and South America that connected the Atlantic and Pacific Oceans. By around 5 to 10 million years ago, the volcanoes and land continued to be pushed up, and sediment from rivers filled in between them, until finally instead of islands there was actual land that connected North and South America. That land is called the Isthmus of Panama and it allowed the great American interchange where animals from North America could cross into South America, and vice versa, but that’s a topic for another episode.

Another result of the Isthmus of Panama’s formation is that the Atlantic and Pacific Oceans were more separated. Instead of ocean currents circulating between North and South America, they were cut off and new currents formed. Ocean currents help distribute warm water to colder areas and cold water to warmer areas, which affects air and land temperatures too. Around 2.5 million years ago, the ocean current changes had changed the entire overall temperature of the earth, making it much cooler overall. That wasn’t the only cause of the ice ages, but it was a major factor.

The earth gradually became cooler and dryer, a process that had already started due to other causes and was accelerated by the ocean current changes. As the global temperature dropped, more and more water was locked up in huge glaciers called ice sheets, at first around the poles and then farther south. This meant sea levels dropped a lot. North America was connected to Asia by a stretch of grassland steppe called Beringia that had formerly been submerged.

As the temperatures dropped and the climate changed, animals and plants had to adapt. The ancestors of modern elephants had lived in Africa for millions of years, but they started migrating to other parts of the world around 3 million years ago. Because they were already big, they were good at retaining heat in their bodies and became quite successful as the climate grew cooler and cooler. They evolved long hair to stay even warmer and spread throughout much of the world, including Europe, Asia, and North America. You may know them as mammoths, which were closely related to the modern Asian elephant. The first mammoth known was the South African mammoth that lived around 5 million years ago and stood about 12 feet tall at the shoulder, or 3.7 meters.

We actually know a lot about the various species of mammoth because we have so many remains. Our own distant ancestors left cave paintings and carvings of mammoths and other animals in many parts of the world, we’ve found lots of fossilized remains, and we have lots of subfossil remains too. Because the mammoth lived so recently and sometimes in places where the climate hasn’t changed all that much in the last 10,000 years, namely very cold parts of the world with deep layers of permafrost beneath the surface, sometimes mammoth remains are found that look extremely fresh.

Before people understood extinction and related natural concepts, some people who lived in areas where dead mammoths occasionally weathered out of the permafrost thought they’d only died recently. That’s how fresh the dead animals looked. The people didn’t know what the animals were, though, and assumed that since they were only ever seen partially buried, they must be underground animals. In parts of Siberia, people thought mammoths lived underground and if they accidentally came to the surface, they died.

In February of 2021, a genetic study of mammoth DNA found in teeth was published in Nature. Nature is one of the most important scientific journals in the world and they don’t just publish any old genetic study these days, now that DNA is so much easier to sequence than it used to be. In this case, though, the DNA came from three mammoth teeth that were more than one million years old and possibly around 1.5 million years old. The teeth were found in the 1970s in different places. Before DNA was successfully found in the teeth, the oldest DNA sequenced was from a horse bone that was about 780,000 years old at the most.

Genetic material breaks down relatively quickly once an animal dies, becoming more and more fragmented as the years pass by. That’s why we don’t have any dinosaur DNA—they just lived too long ago for any usable genetic material to remain. The mammoth genetic study is a big deal since it’s pushed back scientists’ ability to sequence ancient DNA, at least of some samples. In the case of both the mammoth teeth and the ancient horse bone, the remains were preserved in permafrost that slowed the fragmentation of the DNA.

The study found that one of the teeth belonged to an early woolly mammoth and the other two were from early steppe mammoths, but it’s not as simple as it sounds. The two steppe mammoth teeth looked alike but their genetic story was very different. One had genetic markers that identified it as an ancestor of woolly mammoths–but the other didn’t. The one that didn’t is called the Krestovka sample and was found in Russia. Researchers aren’t sure yet if it’s actually a new species or subspecies, but it was obviously part of a population isolated from other steppe mammoths.

But it gets even more complicated, because Columbian mammoths from North America do show that some of their ancestors were related to the Krestovka sample–and Columbian mammoths are also related to woolly mammoths. Researchers suspect that the Columbian mammoth was a species that developed from hybrids of the Krestovka steppe mammoths and woolly mammoths. Over half a million years ago, there were enough of these hybrid mammoths that they were actually numerous enough to form their own stable species. Hybrid speciation is still a relatively new concept but as genetic studies get more sophisticated, we’re getting more evidence of it happening.

Researchers are hopeful that even older genetic samples can eventually be sequenced, but there’s a hard limit to DNA found in permafrost. That limit is 2.6 million years, which is when the permafrost began forming. And that brings us back to the ice age.

Mammoths weren’t the only animals adapted to cold conditions, of course. They weren’t even the only elephant lineage that adapted to the cold. Mastodons aren’t actually that closely related to mammoths but they are an elephant relation.

The woolly rhinoceros was about the size of living rhinoceros species but was covered in thick fur. It had a massive hump on its shoulders that was made up of fat reserves and muscle, much like modern bison. It went extinct about 10,000 years ago.

A giraffe relation, Sivatherium, lived in Africa and parts of Asia during the Pleistocene. Its neck wasn’t as long as a modern giraffe’s but it was still tall, over 7 feet tall at the shoulder, or more than 2 meters, and almost 10 feet tall including the head and neck, or 3 meters. The males had two pairs of ossicones that resembled antlers, a large pair on its head and a smaller pair over its eyes. Ossicones are bony projections usually covered with skin and hair, and modern giraffes have ossicones too.

Mammals weren’t the only megafauna, though. Mega just means big, and fauna just means animal. There were megafauna birds and reptiles too, such as the Asian ostrich. It lived throughout much of Asia and the Middle East until around 8,000 years ago and was related to the modern ostrich. The wonambi was an Australian constrictor snake, not related to the snakes living in Australia now, that could grow up to 30 feet long, or 9 meters.

So what happened to cause the extinction of all these amazing animals? Surely we know more about this extinction event than we do about older ones since it happened so recently, right?

Actually, no. Although it feels significant to us now, the end-Pleistocene extinction event actually wasn’t very big compared to the others we’ve discussed this year. A lot of ice age megafauna are still around, including bears, wolves, moose, reindeer, horses, bison, elephants, giraffes, lions, tigers, camels, kangaroos, tapirs, ostriches, condors, and lots more. Even humans are ice age megafauna since we spread throughout the world during the Pleistocene.

We do have hints of what might have caused the end-Pleistocene extinction event, and one big hint comes from what happened in Australia. Like the rest of the world, Australia’s climate was cooler and dryer during the ice ages and animals that had adapted to the cold lived throughout the continent. This included diprotodon that we talked about in episode 224, along with kangaroos, wombats, koalas, and other marsupial mammals that were bigger than the ones living today. But extinctions in Australia started a lot earlier than they did in the rest of the world, around 45,000 years ago. There’s also no corresponding extinction event among marine animals. By about 40,000 years ago almost 90% of all species of Australian megafauna had gone extinct, while smaller animals and marine animals were mostly just fine.

One specific event that happened around 45,000 years ago was the colonization of Australia by humans. Humans had visited and even lived in Australia as far back as 70,000 years ago, but by 45,000 years ago they were really spreading throughout the land. The animals of Australia had never encountered smart, fast tool-users before and didn’t know what to do except try to avoid them. Humans had weapons like spears that could kill at long range, and humans worked together to kill animals that before then had no predators due to their size. Humans also drink a lot of water because we developed in a part of Africa where water is abundant. Fresh water isn’t nearly as abundant in Australia, so humans would stake out water sources and keep other animals away.

The Australian extinctions were probably a combination of climate change, humans hunting large animals that reproduced slowly, and humans outcompeting animals for water sources. The same causes probably led to extinctions in other parts of the world, but because humans took longer to spread to continents like the Americas that are far away from Africa, those extinctions mostly took place later than in Australia. It’s also important to note that Africa showed almost no extinctions at the end of the Pleistocene. Researchers think this is because the animals of Africa evolved alongside humans and knew how to deal with us.

Natural climate change was definitely a contributing cause to the extinctions, though. Ice sheets melted, glaciers retreated, and the world warmed over the course of just a few thousand years. Animals that were well adapted to the cold had to move to places where it was still cold, but those places didn’t always have the right foods or enough food. The sea levels rose too, cutting off access to parts of the world. Beringia became covered with ocean again, for instance, where it remains today, separating Asia from North America.

Humans probably finished off the mammoths by hunting the last ones to extinction, but some populations survived much later than the 10- to 12,000 years ago commonly given as their extinction date. There were still mammoths alive in the world only 4,000 years ago and maybe only 3,700 years ago—but only on an island where humans didn’t live.

Wrangel Island is located in the Arctic Ocean near western Siberia, more than 85 miles from the nearest coast, or 140 km. It has low mountains and sea cliffs and is cold and dry most of the year, which is the kind of climate mammoths preferred.

The woolly mammoths that lived on Wrangel Island were probably cut off from the mainland when sea levels rose and flooded Beringia. They lived on for thousands of years after their mainland relations had gone extinct. Gradually the mammoths became more and more inbred, leading to genetic defects at a much higher rate than in a healthy population. Even so, the mammoths might have managed to survive even longer except for one thing. Around 1700 BCE, humans arrived on the island. Shortly afterwards, the mammoth was extinct.

Wrangel Island is a nature sanctuary these days and home to lots of animals, including polar bears, walruses, Arctic foxes, seals, reindeer, musk ox, and wolves. All of these are considered ice age megafauna, so although the mammoths are gone, other megafauna remain.

While we don’t know for sure that humans played a big part in the end-Pleistocene extinction event, we sure didn’t help. We can’t blame our ancient ancestors for their actions but we can learn from their mistakes. We’re in the middle of another extinction event right now, often called the Holocene extinction or Anthropocene extinction, directly due to our actions. Habitat loss, pollution, overhunting, and human-caused climate change are driving more species of animal and plant to extinction every year.

It can feel overwhelming, but there are lots of small things you can do to help. Just picking up trash and putting it in the waste bin or remembering to take your reusable bags to the grocery store can make a difference. No one person can fix all the world’s problems, but if everyone does a little bit to help, the big problems get smaller and more manageable. If everyone pitches in, we can make the world a cleaner, better place for animals and for people.

Happy new year! Let’s make it a great one!

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 255: Reptiles with Something Extra

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Thanks to Ethan and Simon this week for their suggestions! This week we’re looking at some extinct reptiles that each have a little something extra (and unexpected).

Further reading:

Two Extinct Flying Reptiles Compared

Cretaceous ‘Four-Limbed Snake’ Turns Out To Be Long-Bodied Lizard

Kuehneosaurids may have resembled big Draco lizards although they weren’t related:

Big turtle:

Purussaurus was big enough to eat even really big turtles (from Prehistoric Wildlife):

Meiolania had a pointy head and a pointy tail:

Not a snake with legs after all:

Show transcript:

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

This week we’ll learn about an extinct reptile suggested by Ethan, some extinct turtles suggested by Simon, and an extinct snake that might not be a snake at all. All these animals had physical details you wouldn’t expect, as we’ll see.

First, though, a reminder that I have five Kickstarter backers who haven’t sent me their birthday shout-out names and birthdays yet! I sent messages to them last month and haven’t heard back, so if you backed the Kickstarter and added on the birthday shout-out, but never got the opportunity to send me your names and birthdays, please message me as soon as possible! The shout-outs start in January!

So, on to the extinct reptiles that each have something a little extra. Let’s start with Ethan’s suggestion, the kuehneosaurids. Kuehneosaurus, kuehneosuchus, and their relations lived around 225 million years ago in what is now England. The first dinosaurs lived around the same time but kuehneosaurids weren’t dinosaurs. They were lizard-like reptiles that grew about two feet long, or 70 cm, including a long tail, and probably lived in trees and ate insects. Oh, and they had wings.

They weren’t technically wings but extended ribs. Kuehneosaurus’s wings weren’t all that big, although they were big enough that they could act as a parachute if the animal fell or jumped from a branch. Kuehneosuchus’s wings were much longer. In a study published in 2008, a team of scientists built models of kuehneosuchus and tested them in a wind tunnel used for aerospace engineering. It turned out to be quite stable in the air and could probably glide very well.

We don’t know a whole lot about the kuehneosaurids because we haven’t found all that many fossils. We’re not even sure if the two species are closely related or not. We’re not even sure they’re not the same species. Individuals of both were uncovered in caves near Bristol in the 1950s, and some researchers speculate they were males and females of the same species. Despite the difference in wings, otherwise they’re extremely similar in a lot of ways.

Generally, researchers compare the kuehneosaurids to modern Draco lizards, which we talked about in episode 237, even though they’re not related. Draco lizards are much smaller, only about 8 inches long including the tail, or 20 cm, and live throughout much of southeastern Asia. They have elongated ribs that they use to glide efficiently from tree to tree, and they eat insects. Draco lizards can fold their wings down and extend them, which isn’t something the kuehneosaurids appear to have been able to do.

Next, let’s look at Simon’s turtles. Stupendemys geographicus lived a lot more recently than the kuehneosaurids, only about 6 million years ago in northern South America. It was a freshwater turtle the size of a car: 13 feet long, or 4 meters. As if that wasn’t impressive enough, the males also had horns—but not on their heads. The male Stupendemys had projections on its shell, one on either side of its neck, that pointed forward and were probably covered with keratin sheaths to make them sharper and stronger. Males used these horns to fight each other, and we know because some of Stupendemys’s living relations do the same thing, although no living species actually have horns like Stupendemys. They’re called side-necked turtles and most live in South America, although they were once much more widespread.

Stupendemys probably grew to such a huge size because there were so many huge predators in its habitat. It lived in slow-moving rivers and wetlands, where it probably spent a lot of time at the river’s bottom eating plants, worms, crustaceans, and anything else it could find. It was too big and heavy to move very fast, but a full-grown turtle was a really big mouthful even for the biggest predator in the rivers at the time, Purussaurus.

Purussaurus was a genus of caiman, related to crocodiles, that might have grown up to 41 feet long, or 12.5 meters. We don’t know for sure since the only Purussaurus fossils found so far are skulls. It ate anything it could catch, and we even have Stupendemys fossils with tooth marks that show that Purussaurus sometimes ate giant turtles too. One Stupendemys fossil has a 2-inch, or 5 cm, crocodile tooth embedded in it.

Stupendemys is the largest freshwater turtle known and the second-largest turtle that ever lived. Only Archelon was bigger, up to about 15 feet long, or 4.6 meters. Archelon was a marine turtle that lived around 70 million years ago. We talked about it in episode 75.

Simon also told me about another turtle genus, Meiolania, which lived in what is now Australia and parts of Asia around 15 million years ago. It might even have remained in some areas as recently as 11,000 years ago. The shell, or carapace, of the largest species grew over 6.5 feet long, or 2 meters. Even the smallest species had a carapace over 2 feet long, or about 70 cm. Since the fossils of smaller species have only been found on islands, researchers think the small size may have been due to island dwarfism. It probably lived on land and ate plants. It also had horns, but not on its shell. These horns were actually on its head, although they aren’t technically horns.

The horn-like projections pointed sideways and its tail also had spikes at its end. That meant it couldn’t pull its head under its shell to protect it like most other turtles can, but on the other hand, anything that tried to bite its head or tail would get a painful mouthful of spikes.

We don’t know a whole lot about Meiolania, including if it’s related to living species of turtle. When the first fossils were found, early paleontologists thought they were lizards, not turtles. What we do know, though, is that people ate them. Bones of some species appear in the middens, or trash sites, of ancient people in Australia, and there’s evidence that they were hunted to extinction within a few hundred years after humans settled where the turtles lived. That would also explain why the island-dwelling species seemed to have lived longer than the mainland species, since people didn’t live on the islands where they’ve been found.

Finally, we’ll finish with Tetrapodophis amplectus, leading to the philosophical question about whether a snake with legs is really a snake. That’s the same question researchers were asking themselves too until very recently. Tetrapodophis was only described in 2015 and was initially determined to be an early snake that had four legs.

Tetrapodophis lived around 120 million years ago in what is now Brazil in South America. It grew about a foot long, or 30 cm, and had a slender, elongated body with small but well-developed legs. Is it a lizard with snake-like characteristics or an early snake that hadn’t completely lost its legs yet?

It had hooked teeth and we know it ate small animals because one specimen actually has the fossilized remains of its last meal in its fossilized digestive system. Initially researchers thought it might have been a burrowing animal, using its small legs to help it grab onto items and push itself forward.

The type specimen was a complete skeleton, which is really rare. Unfortunately it was illegally exported and the paleontologist who described the species didn’t bother to at least invite a Brazilian paleontologist to study the Brazilian fossil. He was also incredibly rude when asked about it so I’m not going to give you his name, but he seems to be a really sketchy guy, which is too bad.

He also made some mistakes that might not have been mistakes. If a person is dishonest in one area, they’re probably dishonest in other areas too. When he described Tetrapodophis, he mischaracterized some aspects of its anatomy to make it seem more snake-like. A new study published in November 2021 corrects those mistakes and determines that instead of being a flashy exciting snake with legs, Tetrapodophis was most likely just a small member of the lizard family Dolichosauridae. I’m happy to report, by the way, that one of the lead authors of the new study is named Tiago Simões, a paleontologist from Brazil.

Dolichosaurs were marine lizards with small legs and snake-like bodies and were actually pretty closely related to mosasaurs. You know, the marine reptiles that lived at the same time as dinosaurs and could grow more than 50 feet long in some species, or 15 meters.

There’s some controversy in the mosasaur camp too, because some researchers think mosasaurs were most closely related to snakes while others think they were most closely related to monitor lizards. It just goes to show that scientific knowledge is forever growing and adapting to new information as it comes to light, but that answers aren’t always clear.

What is clear is that extinct reptiles are awesome, but you probably already knew that.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 254: The Saola and the Striped Bunny

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Thanks to Elaine for suggesting the saola this week!

Further reading:

The saola: rushing to save the most ‘spectacular zoological discovery’ of the 20th century

Striped rabbit revealed in Laos forest

Saola horns:

A saola from a 1999 camera trap (photo taken from link above):

A female saola (named Martha) who unfortunately only survived in captivity a few weeks (photo taken from link above):

A striped bunny!! The Annamite striped rabbit:

Show transcript:

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

This week’s topic is a remarkable hoofed animal suggested last year by Elaine, the saola, and another remarkable animal I learned about while researching the saola. Both animals are newly discovered by science.

The scientific story of the saola starts in May of 1992. The Southeast Asian country of Vietnam had established a new nature reserve a few years before and wanted to learn more about the kinds of animals and plants living there. A team of scientists surveyed the area and one of the things they found was a skull with horns they didn’t recognize. The horns were long and straight and very close together.

They knew the skull came from an animal new to science, so they tried to find one to see what it looked like alive. But they couldn’t find one. It wasn’t until 1998 that a scientist saw a live saola, a female captured by hunters and kept in captivity until it died a few weeks later.

The saola is an antelope-like bovid that looks a lot like an oryx. We talked about the Arabian oryx in episode 218 and there are other species of oryx that live in parts of Africa. Oryx have long, straight horns that grow side by side too. But genetic analysis of saola remains indicates that the saola is much more closely related to cattle than to oryxes. The saola was described formally in 1993 and placed in its own genus, Pseudoryx, meaning false oryx.

The saola stands about 3 feet tall at the shoulder, or 92 centimeters, and is mostly chocolate brown with white markings on the head and a black stripe down its spine. Both males and females have horns, although males grow longer horns. The horns grow side by side, usually only a few inches apart, or about 8 or 9 centimeters, and are dark brown or black. They grow up to about 20 inches long, or 50 centimeters, and are often about the same distance apart at their tips as they are at the base of the skull. People sometimes call the saola the Asian unicorn because it’s so rare and its horns look sort of like unicorn horns, although they grow back from the skull instead of forward and aren’t spiral shaped. So, not actually very much like unicorn horns.

The saola also has a short tail, slender legs, and a short muzzle, but its tongue is over 6 inches long, or 15 centimeters. It’s rough like a cat’s tongue and it uses it to groom itself, just like a cat, and to help it gather the plants it eats, unlike a cat. It lives in forested mountains and migrates to lower elevations in winter, although its fur is thick and soft to keep it warm in higher elevations. It also has special pores around its eyes that secrete a special fluid it uses to mark plants and rocks the way many antelopes do. Because the saola hasn’t been observed in the wild, we don’t know if it’s marking its territory or just letting other saola know where it is.

The saola is critically endangered, mostly due to poaching. A team of forest guards patrols the park looking for traps that hunters set. Poachers often hunt animals in the park not because the hunters are hungry but because they can make a lot of money selling exotic animals to other countries as so-called medicine. The saola isn’t considered to have any medicinal uses, though, so while a hunter will sometimes kill one to eat, mostly it just gets caught in traps set for other animals. Since it’s so rare to start with, every saola killed in this way could ultimately cause the entire species to go extinct.

Conservationists are working hard to help the saola and its habitat. Logging has been banned in the park and the forest guards are on the lookout for illegal logging activity too. The forestry service is working to educate the local people that the saola only lives in their mountains and nowhere else in the world, which is something for them to be proud of. The park is near the border of another country, Laos, which is also helping with conservation efforts since the saola probably lives there too. You won’t find a saola in any zoos, though, because it doesn’t do well in captivity.

Other animals new to science have been discovered in the park and nearby areas, specifically around the Annamite Mountains along the border of Vietnam and Laos. This includes a new species of rabbit.

In 1996 a biologist named Rob Timmins was looking through a market in Laos when he saw three dead rabbits for sale as food. But these rabbits didn’t resemble any rabbits known from the area. They had short ears, reddish rumps, and dark brown stripes. Stripy rabbits! There is a similar-looking species that lives a thousand miles away, or 1,600 kilometers, in the mountains of Sumatra and Indonesia. The Sumatran striped rabbit is brown with darker brown stripes and blotches, but it’s been known to science since 1880. Timmins was the first scientist to see the Laotian rabbits.

Timmins bought the rabbits, of course, so they could be studied. Genetic studies determined that the rabbits are a distinct species, although it’s closely related to the Sumatran striped rabbit. It was described as a new species in 2000 and camera traps have since taken pictures of it in Vietnam, but we still know very little about it and its cousin in Sumatra.

Both species of striped rabbit are threatened by hunting and habitat loss. Hopefully they can be protected, along with their mountain homes, and a captive breeding program started to ensure their survival. Also, I would like one as a pet.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 253: The Sand Striker

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This week let’s learn about a weird marine worm and its extinct ancestor!

Further reading:

Eunice aphroditois is a rainbow, terrifying

The 20-million-year-old lair of an ambush-predatory worm preserved in northeast Taiwan

Here’s the money shot of the sand striker with its jaws open, waiting for an animal to get too close. The stripy things are antennae:

The fossilized burrow with notes:

Show transcript:

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

This week we’re going back in time 20 million years to learn about an animal that lived on the sea floor, although we’ll start with its modern relation. It’s called the sand striker and new discoveries about it were released in January 2021.

Ichnology is the study of a certain type of trace fossil. We talked about trace fossils in episode 103, but basically a trace fossil is something associated with an organism that isn’t actually a fossilized organism itself, like fossilized footprints and other tracks. Ichnology is specifically the study of trace fossils caused by animals that disturbed the ground in some way, or if you want to get more technical about it, sedimentary disruption. That includes tracks that were preserved but it also includes a lot of burrows. It’s a burrow we’re talking about today.

Because we often don’t know what animal made a burrow, different types of burrows are given their own scientific names. This helps scientists keep them organized and refer to a specific burrow in a way that other scientists can immediately understand. The sand striker’s fossilized burrow is named Pennichnus formosae, but in this case we knew about the animal itself before the burrow.

The sand striker is a type of polychaete worm, and polychaete worms are incredibly successful animals. They’re found in the fossil record since at least the Cambrian Period half a billion years ago and are still common today. They’re also called bristle worms because most species have little bristles made of chitin. Almost all known species live in the oceans but some species are extremophiles. This includes species that live near hydrothermal vents where the water is heated to extreme temperatures by volcanic activity and at least one species found in the deepest part of the ocean that’s ever been explored, Challenger Deep.

A polychaete worm doesn’t look like an earthworm. It has segments with a hard exoskeleton and bristles, and a distinct head with antennae. Some species don’t have eyes at all but some have sophisticated vision and up to eight eyes. Some can swim, some just float around, some crawl along the seafloor, and some burrow in sand and mud. Some eat small animals while others eat algae or plant material, and some have plume-like appendages they use to filter tiny pieces of food from the water. Basically, there are so many species known—over 10,000, with more being discovered almost every year, alive and extinct—that it’s hard to make generalizations about polychaete worms.

Most species of polychaete worm are small. The living species of sand striker generally grows around 4 inches long, or 10 centimeters, and longer. We’ll come back to its size in a minute. Its exoskeleton, or cuticle, is a beautifully iridescent purple. It doesn’t have eyes, instead sensing prey with five antennae. These aren’t like insect antennae but look more like tiny tentacles, packed with chemical receptors that help it find prey.

The sand striker lives in warm coastal waters and spends most of its time hidden in a burrow in the sand. It’s especially common around coral reefs. While it will eat plant material like seaweed, it’s mostly an ambush hunter.

At night the sand striker remains in its burrow but pokes its head out with its scissor-like mandibles open. When the chemical receptors in its antennae detect a fish or other animal approaching, it snaps its mandibles on it and pulls it back into its burrow. Its mandibles are so strong and sharp that sometimes it will cut its prey in half and then, of course, it pulls both halves into its burrow to eat. If the prey turns out to be large, the sand striker injects it with venom that not only stuns and kills it, it starts the digestive process so the sand striker can eat it more easily. It does all this so quickly that it can even catch fish and octopuses. The mandibles are at the end of a feeding apparatus called a pharynx, which it can retract into its body.

If a person tries to handle a sand striker, they can indeed get bitten. The sand striker’s mandibles are sharp enough to inflict a bad bite, and if it injects venom it can make the bite even more painful. Not only that, the sand striker’s body is covered with tiny bristles that can also inflict stings, with a venom strong enough that it can cause nerve damage in a human that results in permanent numbness where the person touched it. Don’t pet a sand striker.

Remember how I said the sand striker grows 4 inches or longer? That’s actually the low end of its size. The average sand striker is about 2 feet long, or 61 centimeters, but it can sometimes grow 3 feet long, or 92 centimeters, or even more. Sometimes a lot more.

In January 2009, someone noticed something in a float along the side of a mooring raft in Seto Fishing Harbor in Japan. The mooring raft had been in place for 13 years at that point and no one knew that a sand striker had moved into one of the floats. It had a nice safe home to use as a burrow. Sand strikers grow quickly and this one was living in a more or less ideal situation, so it just grew and grew until when it was found, it was just shy of 10 feet long, or 3 meters. Even so, it was still only about an inch thick, or 25 millimeters.

There are unverified reports of even longer sand strikers, some up to 50 feet long, or 15 meters. Look, seriously, do not pet it. Since sand strikers spend most of the time in burrows, it’s rare to get a good look at a full-length individual in the wild and we don’t know how long they can really get.

In case you’d forgotten, though, we started the episode talking about a fossilized burrow. In a fossil bed in northeast Taiwan, a team of paleontologists uncovered hundreds of strange burrows dating to about 20 million years ago. The burrows were L-shaped and as much as 6.5 feet long, or 2 meters, and about an inch across, or 2.5 centimeters. Even more confusingly, the fossilized sediment showed feather-like shapes in the upper section of the burrows.

The team of scientists studying the burrows had no idea what the feather-like structures were. The burrows were mysterious from start to finish anyway, since they were so much larger than most burrows in the seafloor.

They decided to do something unusual to solve some of the mysteries. They reached out not only to marine biologists but to marine photographers and aquarium keepers to get their insights. And, as you’ve probably guessed by now, the fossilized burrows most closely match those of the sand striker.

They even found out what the feather-shaped structures were. When a sand striker grabs a fish or other prey and drags it into its burrow, a lot of time it’s still alive, at least at first. Its struggles to get away can cause the sides of the burrow to shift. The sediment can’t collapse all the way because the worm lines it with mucus, so the partial collapsing and shifting results in feathery shapes.

These fossilized burrows are the first trace fossils known to be made by a marine ambush predator, which is pretty awesome. It’s even more awesome that some modern sand strikers are using the same type of burrows over 20 million years later.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 252: Mini Rex

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Thanks to Zachary for suggesting this topic! Let’s learn about some sightings of what look like miniature theropod dinosaurs running around in the American Southwest!

Further reading:

All About Birds: Wild Turkey

A collared lizard running (photo by Joe McDonald from this page):

Basilisks running:

A female wild turkey:

A male wild turkey (note the tuft of hair-like feathers sticking forward, called a beard) (picture from this page):

Show transcript:

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

Thanks to Zachary for his email a while back that helped shape this episode. Zachary has kept a lot of different kinds of pets, which we had a nice conversation about, and one of the reptiles he’s kept as a pet is in this episode. I’ll reveal which one at the end.

But first, a small correction, maybe. Paul from the awesome podcast Varmints! messaged me to point out that the word spelled A-N-O-L-E is pronounced a-NOLL, not a-NO-lee. I’d looked it up before I recorded so that confused me, so I looked it up again and it turns out that both pronunciations are used in different places and both are correct. So if you’ve always heard it a-NOLL, you’re fine, but now I can’t decide which pronunciation I should use.

This week we’re going to learn about an interesting mystery of the American southwest. Even though non-avian dinosaurs went extinct 66 million years ago, occasionally someone spots what they think is a little dinosaur running along on its hind legs. They’re sometimes called mini rexes.

Many reports come from the American southwest, especially Colorado, Arizona, and Texas. For instance, in the late 1960s two teenaged brothers were looking for arrowheads near their home in Dove Creek, Colorado when they were startled by an animal running away from them at high speed. The boys said it looked like a miniature dinosaur, only about 14 inches tall, or 35 centimeters. It was kicking up so much dust as it ran on its hind legs that the boys had trouble making out details. They did note that it seemed to be brown and possibly had a row of spines running down its back, maybe even two rows of spines, similar to an iguana’s. It had long hind legs and shorter front legs that it held out in front of it as it ran.

The animal left behind three-toed footprints that the boys followed until they disappeared into some brush. The boys were familiar with turkey footprints but these were different, with the toes closer together and no rear-pointing toe prints.

In April 1996, in Cortez, Colorado, a woman saw an animal run past her house on its hind legs, seemingly from a nearby pond. It was greenish-gray and stood about 3.5 feet tall, or about a meter. It had a long neck and long, tapering tail. She didn’t notice its front legs but its hind legs had muscular thighs but were thinner below the hock joint.

One night in July 2001, a woman and her grown daughter were driving near Yellow Jacket, Colorado when they noticed an animal at the edge of the road. At first the driver thought it was a small deer and slammed on the brakes so she wouldn’t hit it, but when it darted across the road both women were shocked to see what looked like a small dinosaur pass through the headlight beams of the car. They reported it was about 3 feet tall, or 91 centimeters, and that it had no feathers or fur. Its legs were thin and long, while its arms were tiny and held out in front of its body. It had a slender neck, a small head, and a long tapering tail.

The witnesses in both the 1996 sighting and the 2001 sighting noted that the animal they saw ran gracefully. They also all agreed that the animals’ skin appeared smooth.

Lots of dinosaurs used to walk on their hind legs, but the reptiles living today are all four-footed. There are a few lizards that run on their hind legs occasionally, though, and one of them lives in the American southwest. The collared lizard, also called the mountain boomer, will run on its hind legs to escape predators. Females are usually light brown while males have a blue-green body and light brown head. The name collared lizard comes from the two black stripes both males and females show around their necks, with a white stripe in between. During breeding season, in early summer, females also have orange spots along their sides.

The collared lizard can run up to 16 miles an hour, or 26 kilometers per hour, for short bursts on its hind legs. It uses its long tail for balance as it runs, and its hind legs are three times the length of its front legs. This makes it a good jumper too. It mostly eats insects but will occasionally eat berries, small snakes, and even other lizards. It hibernates in winter in rock crevices.

While the teenaged boys probably saw a collared lizard in the 1960s, the other two sightings we just covered sound much different. The collared lizard typically only grows up to 14 inches long, or 35 centimeters, including its long tail.

A few other lizards are known to run on their hind legs, such as the basilisk that lives in rainforests of Central and South America. It’s famous for its ability to run across water on its hind legs. It’s much larger than the collared lizard, up to 2.5 feet long, or 76 centimeters, including its long tail. It holds its front legs out to its sides when running on its hind legs, and the toes on its hind feet have flaps of skin that help stop it from sinking. It has a crest on its head, and the male also has crests on his back and tail. It can be brown or green in color.

The basilisk is sometimes kept as an exotic pet. In 1981 in New Kensington, Pennsylvania, four boys playing along some railroad tracks saw a green lizard that they thought was a baby dinosaur. It was 2 feet long, or 61 centimeters, and had a crest and an extremely long tail. It ran away on its hind legs but one of the boys, who was 11 years old, managed to catch it. It startled him by squealing and he dropped it again, and this time it got away. It sounds like an escaped pet basilisk.

But let’s go back to our mini rex sightings from 1996 and 2001, the ones of dinosaur-like animals running gracefully on their hind legs with a long neck and long tail. These don’t sound like lizards at all. When lizards run on their hind legs, they don’t look much like how we imagine a tiny raptor dinosaur would look. They appear awkward while running, with their arms sticking out and their heads pointing more or less upward. While all the lizards known that can run on their hind legs have long tails, they all have relatively short necks.

There’s another type of animal that’s closely related to the dinosaurs, though, and every single one walks on its hind legs. That’s right: birds! All the birds alive today are descended from dinosaurs whose front legs evolved for flight. Even flightless birds are well adapted to walk on two legs.

Let’s look at the details of those two sightings again. Both were of animals estimated as about three feet tall or a little taller, or up to about a meter, with long neck, small head, long tapering tail held above the ground, and long, strong legs that were nevertheless thin. Both also appeared smooth. In one of the sightings, the front legs were tiny and held forward; in the other, the witness didn’t notice the front legs.

My suggestion is that in these two sightings, at least, the witnesses saw a particular kind of bird, a wild turkey. That may sound ridiculous if you’re thinking of a male turkey displaying his feathers, but most of the time turkeys don’t look round and poofy. Most of the time, in fact, the wild turkey’s feathers are sleek and its tail is an ordinary-looking long, skinny bird tail instead of a dramatic fan. Its feathers are mostly brown and black, the upper part of its long neck is bare of feathers, as is its small head, and its legs are long and strong but relatively thin. It also typically stands 3 to 3.5 feet tall, or up to about a meter, although some big males can stand over 4 feet tall, or 1.2 meters. As for the front legs seen by witnesses in 2001, a full-grown male turkey has a tuft of long, hair-like feathers growing from the middle of his breast, called a beard. It sticks out from the rest of the feathers and might look like tiny arms if you were already convinced you were looking at a dinosaur instead of a bird.

That’s not to say that all mini-rex sightings are of turkeys, of course, but some of them probably are. The wild turkey lives throughout much of the United States, including most of Colorado. Since birds are the closest animals we have to dinosaurs these days, though, that’s still pretty neat.

Finally, the reptile Zachary kept as a pet was the collared lizard. I didn’t want to say so at the beginning and potentially spoil part of the mystery for some people!

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 251: Modern Mimics and HIREC

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This week let’s look at some animals that have evolved rapidly to adapt to human-caused environmental pressures. Thanks to Otto and Pranav for their suggestions!

Further reading:

Long-term changes of plumage between urban and rural populations of white-crowned sparrows (Zonotrichia leucophrys)

A light-colored peppered moth (left) and darker-colored peppered moths (right):

Soot is hard to clean off buildings and other items (image from this page):

A white-crowned sparrow in the California countryside:

A (deceased museum specimen being photographed) white-crowned sparrow from the city of San Francisco, CA (taken from the study linked above):

A decorator crab that has attached bits of plastic and other trash to its body (image from this page):

The hermit crab sometimes uses trash instead of shells to hide in:

Show transcript:

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

This week we have two listener suggestions. Otto suggested we learn about camouflage that mimics modern things, and Pranav suggested animals that show rapid evolution due to humans.

We’ve talked about animals that use camouflage in lots of episodes, especially episode 191, Masters of Disguise. If you want to learn more about camouflage itself, that’s a good one to listen to. In addition, rapid evolution due to humans is a hot area of research right now. It even has its own scientific term, human-induced rapid evolutionary change, often shortened to the acronym HIREC.

Let’s start this episode with the story of a humble moth, because it’s a classic example of both HIREC and modern camouflage.

The peppered moth lives throughout much of the northern hemisphere. Its wingspan is a little over 2 inches across, or about 6 centimeters, and its caterpillar looks just like a little twig. Not only that, the caterpillar can change its coloring to match the twigs of the tree it’s on. But it’s not the caterpillars we’re talking about today.

The peppered moth gets its name from the coloring of its wings, which are white with black speckles, like pepper spilled on a plate. The pattern of speckles is unique to each individual, with some moths having more pepper speckles than others. Some moths have so many speckles that they look gray. But in the 19th century, geneticists studying moths in England noticed that the peppered moth seemed to be changing color as a species. Specifically, some of the peppered moths were completely black.

Black peppered moths had never been documented before 1811. They were still rare in the mid-19th century, but by 1900 almost all of the peppered moths in cities in England were black. Scientists noticed this and tried to figure out what was going on.

Pollution is what was going on. The industrial revolution was in full swing, but all those factories and trains and even ordinary houses were burning coal. Burning coal results in soot that’s carried on smoke and settles on everything. If you have a coal fire in your house, your walls and furniture are going to end up dark with soot. My aunt and uncle renovated a house from the late 19th century and had a lot of trouble cleaning soot from the walls and woodwork, even the old curtains that had been in the house. Similarly, when I lived briefly near Pittsburgh, Pennsylvania, there were still a lot of brick and stone buildings that were black from soot, but one beautiful old church had recently been cleaned and it turned out that the stone it was built from was pale gray, not black.

It wasn’t coal soot getting on the moths, though. It was coal soot on the trees where the moths spent most of their time. Most tree trunks are gray, but with all that coal soot in the air, the trees were coated with it and were much darker gray or even black. A light-colored moth that settled on a black tree branch showed up to predators, but a black moth on the same branch was camouflaged. The black moths survived more often to lay eggs while the white or gray moths didn’t, passing on the genetic likelihood that their babies would grow up to be dark-colored instead of light-colored.

It wasn’t just peppered moths that this happened to, either. More than 100 species of moth were documented to be dark gray or black during this time when they were ordinarily much lighter in color. Scientists call this industrial melanism.

Soot is made up of tiny particles that work their way into the crevices of wood and stone and everything else they come in contact with. You can’t just wipe or rinse it off. It’s acidic too and will kill plants, especially lichens that grow on trees, and it even eats away at stone and brick. It’s dangerous to breathe because the tiny particles lodge in your lungs and eventually stop you from being able to absorb oxygen as efficiently. If you’ve heard of the infamous London smog from the olden days, a big contributor to the smog was coal smoke. In 1952 a five-day smog event in London killed an estimated 12,000 people. That led directly to the Clean Air Act of 1956, and these days London doesn’t have that kind of deadly smog anymore.

Once factories and homes switched to electricity, natural gas, or other alternatives to burning coal, and trains switched to diesel fuel, trees stopped being coated with soot. Older trees that had survived were still dark, but young ones grew up with normal colored trunks and branches. Gradually, the black moths became less and less numerous compared to light-colored moths.

Cities in general result in rapid evolution of animals, including how they camouflage themselves. A study published in May of 2021 found that some birds living in cities are developing different colored feathers. Specifically, white-crowned sparrows living in San Francisco, California have much duller, darker feathers on their backs than white-crowned sparrows living outside of the city. Other studies have found that birds in cities sing much louder and at a higher pitch than birds in the countryside, since they have to compete with traffic and other noise.

A Swiss study on the effects of light on ermine moths indicated that while moths who developed from caterpillars collected from the countryside showed a normal attraction to light, moths from caterpillars collected in the city ignored the light. Since moths often die when they collide with electric lights, the city moths who survived to lay eggs were the ones who didn’t fly into a hot lightbulb.

Another study compared the genomes of white-footed mice that live in various parks in New York City with white-footed mice that live in state parks well outside of the city. The mice in city parks showed a lot less genetic diversity, naturally, since those mice are isolated populations. Mice can’t take cabs to visit mice in other parks, much less leave the city for a vacation. But the city mice showed another surprising difference. Their digestive systems have adapted to a much different diet than their country cousins. Some researchers suggest that the city mice may eat more junk food, which people throw away and the mice find, while other researchers think it’s just a difference in the kinds of insects and plants available in city parks for the mice to eat. Either way, it’s a distinct genetic difference that shows how the city mice are evolving to adapt to their urban environments.

Another example is a type of reptile called the crested anole. It’s related to the iguana and is native to the Americas. There are lots of species and subspecies of anole, many of which live on islands and show distinct adaptations to various habitats. The crested anole lives in Puerto Rico and on some nearby islands and grows up to 3 inches long, or 7.5 cm, not counting its long tail. The male is more brightly colored than the female, usually green or brown with darker spots. It’s not related to the chameleon but it is able to change color. It eats small animals, including insects, worms, even other anoles. Anoles are really interesting animals that deserve their own episode one day, so let’s just talk about how the crested anole that lives in cities has adapted to urban life.

One thing the crested anole is known for is its ability to climb right up tree trunks and even perch head-down in a tree. Its toe pads have microscopic scales and hairs that help them adhere to smooth surfaces, something like a gecko’s toes. But there’s a big difference in a tree trunk, no matter how smooth it is, and a pane of glass. Anoles in cities can climb up and down windows and painted walls. Researchers examined the toe pads of city crested anoles and compared them to the toe pads of crested anoles who lived in the countryside. They found that the city anoles had larger toes with more scales, and they even had longer legs. The research team also raced anoles along various surfaces and filmed them in slow motion to study how they were able to maneuver, which sounds like a great day at work.

The crested anoles have only lived in cities for a few decades, so their differences from country anoles evolved very quickly. But not all species of anole can adapt as well and as rapidly as the crested anoles have. Other city anole species don’t show differences from their country cousins.

Human-induced rapid evolutionary change isn’t restricted to cities. Trophy hunters who target the biggest animals with the biggest horns or antlers and leave smaller individuals alone have resulted in only smaller males with smaller horns or antlers surviving to breed. Many populations of bighorn sheep now actually only have small horns. Similarly, elephants have been killed for their tusks for long enough that many elephants are being born without tusks, because tuskless elephants are the ones that survive to breed. Entire populations of some fish species are smaller overall after many generations of being caught with nets, because only the individuals who are small enough to escape the nets survive to breed.

I tried hard to find more examples of animals that camouflage themselves to blend in to human-made items like roads. I’m sure this is happening throughout much of the world, but I couldn’t find any scientific studies about it. If any of you are thinking of going into biology, that might be an interesting field of study. But I did find one other example.

Self-decoration is a type of camouflage I don’t think we’ve talked about before. It’s where an animal decorates its body with items that help it blend in with its surroundings. Some caterpillars will stick little bits of lichen or other plant pieces to their bodies to help them hide, and some invertebrates of various kinds actually pile their own poop on their back as a disguise.

A group of crabs called decorator crabs will stick plants, sponges, and other items to their backs, and different species have preferences as to what items they use. Some species prefer stinging or toxic decorations, such as certain sea anemones which they basically pick up and plant on their backs. Researchers think the sea anemones actually benefit from being used as camouflage, because crabs are messy eaters and the anemones can catch and eat pieces of food that float away from the crab’s mouthparts. A decorator crab’s carapace is often rough in texture with tiny hooks to help things stick to it like Velcro.

Some decorator crabs don’t seek out particular decorations but just make use of whatever small items they find in their local environment. In the past few decades, scientists, divers, and other people who find crabs interesting have noticed more and more decorator crabs using little pieces of trash as decoration. This includes fragments of plastic and pieces of fishing nets.

This is similar to what’s happening with hermit crabs, which we talked about in episode 182. In many places hermit crabs are using trash like bottle caps instead of shells since there’s so much trash on beaches these days. This is your reminder to pick up any trash you find on the beach, but be careful not to cut yourself and also make sure you’re picking up actual trash and not a camouflaged crab.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 250: Mystery of the Golden Toad

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This week let’s look at a scientific mystery: what caused the golden toad to go extinct, and is it still alive after all?

Further reading:

A deadly fungus is killing frogs, but the bacteria on their skin could protect them

The male golden toad:

The female golden toad (photo by Mary Crump):

Monteverde Cloud Forest Reserve is gorgeous and hopefully still hides some golden toads:

Show transcript:

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

This is our 250th episode, not counting the various bonus episodes, and I should have prepared a special show as a result but I didn’t notice until just now. But let’s pretend this is a special episode 250 show. It’s all about the golden toad.

The golden toad is from a tiny area of Costa Rica in Central America. I really do mean a tiny area. North of the city of Monteverde is the Monteverde Cloud Forest Reserve, and the toad was only known from one small part of the reserve that was less than two square miles in size, or about four square kilometers. Specifically, it’s from a single ridge in the nature reserve.

A cloud forest is a type of high altitude rainforest. Because temperatures tend to be much cooler than in an ordinary rainforest, a cloud forest can look very different and sometimes wonderfully strange. Cloud forests are foggy a lot of the time and the trees are often covered in thick mosses. In some cloud forests the trees are quite small while ferns and other plants can grow extremely large.

The Monteverde Cloud Forest Reserve is home to thousands of plant and animal species, many of them found nowhere else in the world. That includes the golden toad.

The golden toad gets its name from the male’s coloring. The males are a beautiful golden orange while the females are mostly gray or black with yellow, red, or green markings. As in many frogs and toads, females are larger than males, with a big female growing over two inches long from nose to butt, or about 5.5 centimeters.

The golden toad was only discovered by scientists in 1964 and described in 1966. The last golden toad was a male observed in May of 1989 during what should have been the mating season, but he was all alone. The golden toad was declared extinct in 2004 after repeated searches turned up no toads at all.

It’s easy to think that because the golden toad was restricted to such a small area, it was inevitable that it would go extinct, but the toads were actually common throughout their range until suddenly they weren’t. We’re not sure what happened. Here’s the story.

When the toad was first discovered, researchers estimated that there were around 1,500 adult toads living on the ridge. Most of the time the toads were hard to find, since during the dry season, or when they weren’t actively hunting the insects they ate, they’d stay in underground burrows where it was always nice and damp. But when the spring rains started, the males would hop out and gather around shallow puddles at the base of trees. Females would join the males, and because there were always more males than females, they’d all try to be the one to fertilize her eggs. During this time researchers were able to observe and count the toads, which they described as looking like living jewels.

The female golden toad laid her eggs in the pools of rainwater. The eggs hatched quickly but the tadpoles needed to live in their pool for at least four more weeks until they metamorphosed into toadlets that lived on land. If there was too much rain, the pools would overflow and the tadpoles were in danger of being washed out to die. If there wasn’t enough rain, the pools would dry out and the tadpoles would also die. But most years conditions were pretty good and lots of tadpoles lived to grow up. Until 1987.

A behavioral ecologist who specializes in amphibians, Martha Crump, was studying the golden toads in 1987. In April things seemed normal. The females laid their eggs in the shallow pools as usual, but then the rains stopped. The pools dried out and the eggs and tadpoles all died. When it rained again in May, the females laid more eggs and Dr. Crump counted them, because scientists do a lot of counting. She counted about 43,500 toad eggs. But the pools dried up again, and it was sadly easy for Dr. Crump to count how many tadpoles survived. It was only 29.

The next year, in 1988, there were only ten adult golden toads found. In 1989, one golden toad. In 1990 and beyond, zero golden toads.

The unusually dry spring of 1987 was a devastating blow to the golden toad population, but the adults weren’t affected. They had their nice damp burrows to live in and lots of insects to eat. Dry conditions happen every so often but not every year. Obviously something else happened between 1987 and 1988 to kill off almost all the adult toads too.

Researchers couldn’t figure out what might have happened. One hypothesis was that drought caused by the El Niño weather pattern was unusually severe in 1987 and killed off the adults as well as that year’s eggs and tadpoles. Another was that pesticides had found their way into the environment and killed the toads. Many researchers hoped that the toads were actually still alive, just hiding in their burrows until conditions improved, and every spring for many years toad experts waited to see if the living jewels would emerge during the spring rains. But they never did.

At the same time, though, toads, frogs, and other amphibians around the world were declining in numbers and going extinct. A veterinarian named Lee Berger, who was working toward her doctorate degree, discovered why in 1998. It’s a disease called chytridiomycosis, which is caused by a fungus. The disease infects the animal’s skin, and since amphibians absorb water, oxygen, and some essential minerals through their skin, the disease kills them rapidly.

Chytridiomycosis doesn’t kill every frog. Some species are more or less immune to the disease’s effects, but when infected frogs are taken to other places by people, as pets or food or whatever reasons people have for moving frogs around, the disease spreads rapidly. By the time Dr. Berger identified the cause, dozens of species of amphibian had already gone extinct as a direct result of the disease, and it’s continued ever since. The fungus spreads through water, so if a healthy frog moves into an infected pond, it’s likely to contract the disease.

There’s no cure for chytridiomycosis and treatment isn’t always effective. It doesn’t mean all amphibians are doomed, though. Studies of species that show natural immunity reveal that some amphibians have beneficial bacteria on their skin that stops the fungus from infecting it. Frogs from parts of Costa Rica show various levels of resistance to the fungus even though Costa Rica is particularly hard-hit when it comes to the disease.

The fungus especially thrives in cooler areas in high elevations—exactly the kind of place where the golden toad lived. Even so, the golden toad might have survived and developed a resistance to the disease, except for the bad luck of a drought year that killed off all the eggs and tadpoles at the worst possible time.

But while researchers have searched for the golden toad for years without luck, it might still be around. In 1991 one farmer reported seeing a pool full of healthy golden toads in a remote part of the cloud forest, including young toads. Other people have reported sightings too.

The important thing is that the Monteverde Cloud Forest Reserve is still protecting the golden toad’s habitat, along with all the other animals and plants in the reserve. If the golden toad is still hanging on, hopefully with individuals that have developed a resistance to chytridiomycosis, it has a safe place to increase in numbers.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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 249: Strange Seals

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Thanks to Richard from NC for his suggestion that leads us to learn about some interesting seals!

Further reading:

Mystery of Siberian freshwater seal food choice solved

Under Antarctica’s ice, Weddell seals produce ultrasonic vocalizations

Further listening/watching:

Rarely-heard Weddell Seal Sounds in Antarctica

The bearded seal Wikipedia page with audio so you can listen over and over and over

The Baikal seal, the world’s only fully fresh water seal species:

Baikal seal, round boi:

The Baikal seal’s teeth have teeth:

A Weddell seal mama with her pup who seems to be practicing singing:

Look ma, no ears!

The bearded seal. Can you tell where its name comes from? (Moustachioed seal might be more accurate.) (Also, note the ear opening with no external ear flap.)

Show transcript:

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

This week let’s learn about some interesting seals. Thanks to Richard from NC who suggested freshwater seals, which is where we’ll start.

Most seals live on the coast and spend most of the time in the ocean. But there’s one species of seal that lives exclusively in fresh water. That’s the Baikal [bay-CALL] seal, and the only place it lives is a big lake in Siberia called Lake Baikal.

Lake Baikal formed where two sections of the earth’s crust are being pulled apart by continental drift. That’s called a rift lake or rift valley lake. The lake gets bigger every year, but only by a tiny amount—just under an inch, or 2 cm. Since this has been going on for an estimated 25 to 30 million years, though, it’s an extremely big, deep lake. It is, in fact, the deepest lake on earth, and is also the oldest lake on earth. It’s more than twice as old as Lake Tanganyika in East Africa, which is also a large, deep rift lake but only about 12 million years old at the most.

Lake Baikal is almost 400 miles long, or 636 km, and nearly 50 miles wide, or 80 km. At its deepest point, it’s 3,893 feet deep, or 1,186.5 meters. That’s from the surface of the water to the muddy bottom. But that mud and sediment on the bottom has been building up for a very long time and there’s a lot of it—4.3 miles of it, in fact, or 7 km. The water is very clear and very oxygenated, but the surface freezes for several months out of the year. Then again, there are some hydrothermal vents, especially in the deepest areas, that heat the water around them to 122 degrees Fahrenheit, or 50 Celsius.

Because Lake Baikal is so deep, so big, so oxygenated, and so old, lots of species of animal live in and around it that live nowhere else in the world. That includes the Baikal seal.

The Baikal seal is related to the Arctic ringed seal but has lived in the lake exclusively for probably two million years. It only grows five and a half feet long at most, or 1.65 meters, and is usually closer to four feet long, or 1.2 meters. It’s gray in color and has no external ears, so that its head appears smooth. It can still hear, but because it doesn’t have ears sticking out of its head, it’s more streamlined than seals with external ears. It has large eyes, a pair of front flippers that it uses to maneuver in the water and on land, and a pair of hind flippers that act like a tail instead of legs.

That’s actually the main difference between earless and eared seals. Earless seals are more streamlined in general and more adapted for life in the water and for deep diving, but they’re awkward on land because they can’t use their hind limbs for walking. Eared seals have little flaps of external ears and while their hind flippers act as a tail in the water, the seal can turn its hind flippers over to walk on them on land.

The Baikal seal is quite small for a seal, which keeps it from needing as much food as a bigger animal. For a long time people thought the Baikal seal mostly ate fish, but a study published in late 2020 determined that it eats a whole lot of amphipods. Lake Baikal is home to a species of amphipod that grows up to about 10 millimeters long. Amphipods are a type of crustacean and all other freshwater amphipods known are bottom-dwellers. Only the Lake Baikal amphipod is free-floating.

The seal catches these tiny amphipods by sucking them up in a big mouthful of water, closing its teeth tightly, and using its tongue to force the water out through its teeth. The amphipods get caught against the teeth and the seal swallows them, yum. This is a type of filter feeding used by some other species of seal too, including the crabeater seal. Like the crabeater seal, it’s so well adapted to filter feeding that it has specialized teeth with curved projections all around their edges. These projections interlock closely when the seal closes its mouth. Because it doesn’t have to depend on eating fish, the Baikal seal isn’t threatened by commercial fishing. As long as it has plenty of amphipods to eat, it’s happy.

While the Baikal seal is the only truly freshwater seal species, a subspecies of ringed seal lives in a lake in Finland. Unlike the Baikal seal, though, which are numerous and doing just fine, the Saimaa ringed seal is endangered, with only around 400 individuals left in the wild. They’re strictly protected these days, fortunately, and the population is growing after it reached a low of only about 100 animals in 1983.

During the Pleistocene, the land mass that is now Finland was pressed down by the weight of glaciers. Once the glaciers melted, the land began to slowly rise back up until the lake where a population of ringed seals lived was cut off from the ocean.

Some other seals live in lakes that are cut off from the sea, including a population of harbor seals in Iliamna Lake in Alaska and a subspecies of harbor seal in northern Quebec, Canada, but let’s move on to seals that live in the ocean instead of fresh water.

Specifically, let’s discuss two earless seals that make interesting sounds. You may think you know what a typical seal sounds like, such as this kind of barking call:

[barking sound]

That’s actually not a seal but a closely related pinniped called a sea lion. Even though it’s not a seal, it is sort of technically a seal because it shares a family with fur seals and walruses, Otariidae, also called the eared seals that we talked about earlier. Some seals bark like sea lions and make lots of other noises, but it’s the earless seals that can really make weird sounds.

For instance, listen to this eerie sound:

[Weddell seal call]

That’s not a whale, it’s a seal. The Weddell seal lives around Antarctica and can grow quite large, up to 11 ½ feet long, or 3.5 meters. Males and females look alike although females tend to be slightly larger. It eats fish, squid, crustaceans, and pretty much anything else it can catch. It dives deeply and can stay underwater for up to 80 minutes, and while it has good eyesight, it doesn’t need to see to find food. The whiskers on its snout are incredibly sensitive and can sense tiny movements of water that indicate exactly where a fish or other animal is swimming.

Both male and female Weddell seals make various vocalizations, including some that can be described as songs, although the songs seem to be rare and researchers aren’t sure what the seals communicate with them. There’s still a lot we don’t know about these seals. Because Antarctica is so far away from most human activity, it’s extremely quiet most of the time. The seals can hear each other without having to compete with the noise from cars and boats and things like that. A seal sitting on the ice can hear other seals calling from deep in the water below the ice, and in fact the ice can amplify the sounds so well that scientists living in the Antarctic report being able to feel the sounds as well as hear them.

Here’s another clip of Weddell seals. These sounds are taken from an amazing youtube video I’ve linked to in the show notes. It’s short and has two scientists talking a little bit about their experiences hearing the seals, and then there’s about a minute of seal calls afterwards.

[Weddell seals calling]

Another seal with a loud, amazing vocalization is the bearded seal. It lives on the other side of the world from the Weddell seal, in the Arctic Ocean, and can grow almost nine feet long, or 2.7 meters. It eats fish and squid but mostly eats animals that live on the sea floor, including clams, polychaete worms, sea anemones, and many others. Like the Weddell seal and many other seals, its whiskers are incredibly sensitive. The bearded seal uses its long whiskers to feel around in the soft mud at the bottom of the ocean, looking for food.

In the spring, male bearded seals sing loudly and rhythmically, either to attract a mate or to defend a territory, or maybe both or something else—we don’t know. This is what the bearded seal sounds like underwater. I grabbed this audio off Wikipedia if you need to listen to it on repeat for a very long time. It’s an incredible sound.

[bearded seals singing]

This is what a bunch of bearded seals sound like when they’re singing together. This audio was taken on land although the seals sing underwater.

[more bearded seals singing]

These vocalizations sound so much like whale calls that I wondered if some seals can echolocate the way whales and dolphins can. There are quite a few studies into this topic, but right now most of the evidence points to no, seals don’t use echolocation to navigate underwater. Of course, studies in the future might discover something new about potential echolocation in seals. It’s only been very recently that sophisticated studies on bats have discovered that many species use different types of echolocation.

Conclusions of a two-year study published at the very end of 2020 show that a lot of Weddell seal vocalizations are ultrasonic, meaning they’re much higher than humans can hear. While the study doesn’t show any evidence of echolocation, they weren’t actually looking for it either. So you never know.

It’s possible, of course, that even if seals don’t echolocate right now, they might one day evolve the ability. Earless seals are well adapted to the water but still spend part of the time on ice or on land, especially to give birth. Many millions of years from now, the descendants of today’s seals might be completely aquatic the way whales and dolphins are. Because most scientists today think that seals can’t echolocate because their ears need to be useful on land as well in water, a fully aquatic seal that doesn’t need to hear well in the air might then develop echolocation to help it navigate underwater.

I’ll do a follow-up episode about seals and echolocation in a few million years when we can determine whether that’s happening.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or just tell a friend. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us that way.

Thanks for listening!

Episode 248: The Giant Jellyfish Revisited

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We’re down to the last few days to back our Kickstarter!

We’ve got a slightly different type of episode this week. Follow along as I try to find out more about the giant jellyfish that nearly sank a ship!

Further reading:

Kraken: Monster of the Deep

A lion’s mane jellyfish:

A giant squid:

The first photo ever taken of a giant squid:

Show transcript:

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

Halloween is behind us and we’re all now ready to head into winter, if we live in the northern hemisphere, or summer, if we live in the southern hemisphere. This week’s episode is a little different, but hopefully you’ll like it.

Before we get into this week’s topic, let me give you the very last Kickstarter update, I promise! From here on out you’ll only get updates through the Kickstarter page if you backed the project. If you’re listening to this episode within a day or two of its release on November 1, 2021, you still have time to back the Beyond Bigfoot & Nessie book! The campaign ends on Nov. 5, but at 12:03 am eastern time, and one of the many things I’ve learned about running a Kickstarter is maybe don’t launch the project at midnight because then it ends at midnight. Remember that if we reach 100 backers before the end, I’ll release a second bonus episode from the audiobook. I’m really late getting this episode done so it’s actually Halloween as I record this, and we currently have 67 backers, which is amazing! Remember, we have a $1 tier if you just want to pitch a dollar in.

That reminds me, after the campaign is over I’m going to update the first bonus episode and take out the ten minutes of Kickstarter talk that starts it. Thanks again to everyone who’s backed the project. I’m blown away by everyone’s support! If you want a copy of the book but not right now, it’ll be available to buy from your regular book-buying places but only after all the Kickstarter backer rewards are sent.

As it happens, this week’s episode is connected with the Beyond Bigfoot & Nessie book. Specifically, I decided to add a chapter about the giant jellyfish we talked about in episode 16, but to do that I needed to do a lot more research.

That story has actually bothered me for a long time. When I first started the podcast, I wasn’t always as diligent in my research as I am now. If a story came from a source I trusted or had enough realistic-sounding details, I’d assume it was accurate. This story met both criteria but whenever I thought about it, something felt off. So I was glad to dig in and find out more.

This episode is about the research process I went through, which will give you a little bit of a behind-the-scenes look at how I approach each episode. We’ll also learn about a couple of other weird events where a ship or boat was seemingly attacked by a sea monster.

Let’s start with the story as I reported it in episode 16. I think you will appreciate how much better our audio quality is these days. Here it is:

“In 1973, the Australian ship Kuranda collided with a huge jelly in the South Pacific while traveling through a storm on her way to the Fiji Islands. The jelly was so enormous that the deck was covered in jellyfish goo and tentacles up to two feet deep [61 cm]. One crew member died after getting stung. The weight of the jelly was so great, an estimated 20 tons [18 metric tons] that it started to push the ship nose-down and the captain, Langley Smith, sent out an SOS. The salvage tug Hercules arrived and sprayed the Kuranda’s deck with a high-pressure hose, dislodging the jelly. Samples were sent to Sydney and tentatively identified as a lion’s mane jelly.”

My first step was to find where I got that story. I was pretty sure it was from Karl Shuker’s blog but when I looked, it wasn’t there. I checked his books that I own and it wasn’t there either. A quick internet search turned up the story in a lot of places with more or less identical wording, but no one said where they’d found the story—except one site, which referenced a book called Mysteries and Monsters of the Sea.

I looked it up and discovered it was a 1998 book, also published as Mysteries of the Deep, made up of articles from FATE Magazine. One of those articles is titled “Giant Jellyfish” and is by Karl Shuker.

The story appeared in the March 1994 issue of FATE, so my next step was to find the article. Karl Shuker is a zoologist who writes a lot about mystery animals, and he’s very good about sharing his sources.

FATE Magazine is still around and isn’t giving its old issues away for free. Then, in one of those amazing, wonderful coincidences, I found an ebay auction for that very issue that had nice clear photographs of several pages to show how good a condition it was in. One of those pages just happened to be the one I needed. I grabbed a screenshot and enlarged it so I could read the text. Shuker writes, “One of the most dramatic cases on record was documented by James Sweeney in Sea Monsters (1977), and took place in January 1973.”

Bingo! Now I just had to find a copy of that book. I found a used copy online that wasn’t very expensive and ordered it, but a little more searching online led me to a digitized version that I was able to access by logging in to the Internet Archive.

I found the story on pages 73-76. It has lots of details that should be easily corroborated, although unfortunately there isn’t a specific date. My next step was my newspapers.com account to see how the event was reported at the time.

This is where I came up against a blank wall. There was nothing in any of the hundreds of digitized newspaper archives available. I searched for the name of the ship, the Kuranda. I searched for the name of the captain, Langley Smith. I couldn’t find a single mention of either, never mind an encounter with a gigantic jellyfish.

It wasn’t looking good for the story, but I had one more clue. The account starts out in Sweeney’s book:

“One of the strangest, and probably best documented, sea monster stories to be found anywhere is recorded in the Colonial Secretary’s File of the Archives, State Library, Melbourne, Australia. Written testimony submitted by the officer of the watch and others tells clearly what happened to the steamer Kuranda.”

Melbourne is in Victoria, so after some searching online for the archives mentioned in the book and not finding them, I used the Ask a Librarian feature on the State Library Victoria website. I got a response only a few hours later asking for a little more information, which I supplied. I gave the gist of the story, including the details of the ship’s name, the captain’s name, and so forth, and I even gave the link to the digitized version of Sweeney’s book.

A few days later I got a response from a librarian named Jane. I’ll break it down for you.

Jane discovered there were two ships named Kuranda. One was broken up in 1936, the other wrecked in 1969.

In 1973, when this story was supposed to have taken place, there was no longer a colonial secretary in any Australian state. Therefore there is no Colonial Secretary’s File of the Archives from 1973 or after.

And there are no records of a Langley Smith who is a ship’s captain.

At this point I decided, reluctantly, that the story is probably fiction. I actually dug around looking at the table of contents of various 1970s magazines that might have published a fictional story about the giant jellyfish and claimed or implied it was real. I even thought about finding Sweeney’s email and just asking him if he remembered where he learned about this story. Sadly, it turns out that he died in 2019.

According to his obituary, Sweeney worked as a forest ranger for most of his life and was also a voracious reader. I don’t want to believe that a forest ranger who likes to read could possibly stretch the truth so I assume he read about the giant jellyfish somewhere, thought it was a true story, and added it to his book. This was long before the internet so he couldn’t just look stuff up online like I’m doing.

Just to make sure, though, let’s take a look at something else Sweeney mentions in his book. He writes, “Perhaps those aboard Kuranda were luckier than they realized. For the Times of London carried a story somewhat similar. Unfortunately, it ended in absolute horror.”

Back I went to newspapers.com, and by the way, a big thanks to the podcast’s Patreon supporters whose contributions allow me to subscribe. The Times isn’t listed on the site, which mostly focuses on American newspapers, but when I did a search for the name of the ship given in Sweeney’s book, the steamer Strathowen, during the 1870s when he reported it occurred, I got lots of hits.

Here’s an excerpt from The Freeman’s Journal of Dublin, Ireland from July 2, 1874.

“The octopus is likely to lose none of its popularity in the Brighton Aquarium, if we are to believe a strange story which comes from India. The master of the screw steamer Strathowen, on his way to Madras, observed a little schooner lying becalmed, and between him and her what he at first thought to be a bank of weed. The mass was perfectly quiet, but after a time began to move towards the schooner. Suddenly it struck her, and sunk her to the bottom. The master of the Strathowen put about, dropped boats, and saved five men from the sunken ship. James Floyd, the master, was rescued, and he tells his story in the most circumstantial fashion. The Pearl schooner, 150 tons, was bound from the Mauritius to Rangoon. On the 10th of May about five in the evening he observed a great mass rising slowly out of the sea. It remained stationary, and looked like the back of a huge whale. In a hapless moment he took his rifle and hit the monster, which began to lash about furiously. … All the men were then ordered up, and knives and hatchets and cutlasses were grasped, and all awaited the advent of the terrible stranger. The narrator proceeds: ‘We could now see a huge oblong mass moving by jerks just under the surface of the water, and an enormous train following; the oblong body was at least half the size of our vessel in length, and just as thick. The wake or train might have been 100 feet long. In the time that I have taken to write this, the brute struck us, and the ship quivered under the thud; in another moment, monstrous arms like trees seized the vessel, and she heeled over. In another second the monster was aboard, squeezed in between the two masts…. [T]he brute holding on by his arms, slipped his vast body overboard, and pulled the vessel down with him on her beam ends.” The general opinion amongst the sailors is that the big bank of sea-weed was an octopus, but we dare say a little confirmation of the story would be welcomed by us all whether naturalists or not.”

This is actually a brief and measured account of the story that appeared in the Times and which later hit the American papers. The longer account reads very much like fiction. The Dublin paper’s tone of interested skepticism matches what I feel, but the story does corroborate what Sweeney wrote in his book about sea monsters, so at least Sweeney wasn’t making stuff up.

I found a 2019 article in Skeptical Inquirer that did all the research about the octopus or squid sinking the Pearl. According to the author, there’s no record of a ship named the Strathowen or a captain named James Floyd. The author also points out that Jules Verne’s novel Twenty Thousand Leagues under the Sea was published in 1869, only five years before, and included an attack on the submarine by giant cephalopods.

Before you get too discouraged, though, the Skeptical Inquirer article also talks about a giant squid attacking a small boat, and that one actually happened.

In October 1873 in Conception Bay, Newfoundland, two fishermen and a boy were crossing the bay in a rowboat and noticed something floating in the water. As they neared it, it grabbed the boat with two tentacles and pulled so hard that the boat started to take on water. Luckily there was a hatchet in the boat, and the boy grabbed it and chopped off the tentacles. Later he sold the longer tentacle to a minister who lived nearby and who was interested in squid, which were often referred to as devil-fish back then. The minister, Moses Harvey, wrote about it later and reported that the partial tentacle was as thick as a man’s wrist and measured 19 feet long, or almost 6 meters.

Only a few weeks later Harvey bought a giant squid that had been tangled in a fishing net and hauled ashore. He arranged to get a photograph of it because he knew a lot of people wouldn’t believe how big it was otherwise, and his photo was the very first one taken of a giant squid. It wasn’t until 2004 that the first photographs of a living giant squid were taken.

We talked about the giant squid in episode 74 and we talked about some other types of huge squid in episode 235. I’m willing to bet that there are even larger squid living their quiet squid lives in the depths of the ocean, just as there are probably jellyfish larger than any human has ever seen. Let’s just hope they leave ships and boats alone.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. We also have a Patreon at patreon.com/strangeanimalspodcast if you’d like to support us for as little as one dollar a month. This month’s Patreon episode is about two hikers in the Pyrenees Mountains who heard a ferocious, terrifying roar out of the darkness near their camp.

Thanks for listening!

Episode 247: Shapeshifters

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Happy Halloween! Let’s learn about some shapeshifters of folklore, including the werewolf and kitsune (thanks to Joel, Pranav, and Emma!), and a real-life shapeshifter.

Don’t forget the Kickstarter, as if I’d let you forget it: https://www.kickstarter.com/projects/kateshaw/beyond-bigfoot-and-nessie

Further reading:

Folklore and Mythology

Breeding Butterflies

Further listening:

MonsterTalk (note: sometimes there’s adult language or really scary themes)

Sandman Stories Presents podcast

A death’s head hawkmoth, looking spooky:

A death’s head hawkmoth caterpillar, not looking spooky at all:

Show transcript:

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

It’s Halloween week and that means we need to talk about a truly spooky monster! Both Joel and Pranav suggested the werewolf a while back and Emily suggested the kitsune [kee-tsoo-neh], so let’s learn about shapeshifters and were-animals of all kinds. “Wer” is an Old English word that just means “man,” and just to get confusing, the word “man” used to refer to any person. The word “wif” referred to a woman, with wifman actually meaning woman. From those words we get the modern uses of wife, woman, and man, while “wer” is obsolete except in werewolf.

Let me derail myself from talking about language by reminding you about our Kickstarter! It ends pretty soon, on November 5, 2021, so if you’ve been thinking about backing the project this would be a great time. It’s to help me publish a book all about mystery animals, called Beyond Bigfoot and Nessie: Lesser-Known Mystery Animals from Around the World. The book has a foreword by Blake Smith of MonsterTalk, the science show about monsters, and if you don’t already listen to that podcast, it’s a whole lot of fun and informative too. Thanks to everyone who has already backed the project!

Now, Happy Halloween and on to the spookiness!

The important first question we need to answer is if werewolves really exist.

No. They do not exist outside of folklore and fiction, and I’ll explain why later so you don’t ever have to worry about werewolves or any other shapeshifters. But first, let’s learn what werewolves and kitsunes are.

Werewolves are supposed to be people who can turn into wolves. Depending on the story, this can happen when the person wants to turn into a wolf or it can happen during the full moon whether the person wants to be a wolf or not. Sometimes the person has a magical wolfskin or some other item that they put on in order to transform. Sometimes they have to cast a magic spell, but sometimes it’s a curse that someone else has inflicted on them. Some stories say that the only way to kill a werewolf is by shooting it through the heart with a silver bullet, especially one that’s been blessed by a priest.

The werewolf is mainly from European folklore, where for many centuries all werewolves were also supposed to be witches. Until about the 18th century in some areas, if someone accused you of being a werewolf, you could be put on trial as a witch. Lots of people were convicted of witchcraft and killed during waves of witch-hunts in various parts of Europe. Most of the people accused were women, especially elderly women, especially women who were widowed or single, especially women who owned land that someone else wanted. Hmm.

The kitsune is a creature of Asian folklore, especially from Japan, that’s basically a fox that can work magic. It’s sometimes said that all foxes can turn into humans if they want, especially older foxes. The older and more powerful a kitsune is, the more tails it’s supposed to have, up to nine. Kitsunes sometimes play tricks on people but they can also act as guardians and friends.

About the same time that old ladies were being accused of being werewolves in Europe, though, around the 15th to the 18th centuries, something similar happened in Japan. People were much more superstitious during this time and thought the kitsune was a dangerous goblin-like creature that could possess people and make them act like animals. These days the kitsune is back to being considered mostly a friendly trickster.

Werewolves weren’t the only shapeshifters in the folklore of Europe, although they were the most common. A German story collected in 1879 is about someone who could transform into a fox using an item called a strap.

“In the village of Dodow near Wittenburg there lived an old woman who possessed a fox strap. With its help she could transform herself into a fox, and thus her table never lacked for geese, ducks, and all kinds of poultry.

“Her grandchild knew about it, and one day when the schoolmaster was talking about magic in the school, the child told about the fox strap, and the next day brought it to school.

“The schoolmaster took it into his hand and unintentionally approached his head with it. Suddenly he was standing before the children, transformed into a fox. They broke out with a deafening noise. This so frightened the little schoolmaster that he jumped out the window with a single leap.

“He ran to the hill that lay near the village and there built himself a den.

“One day a great hunt was organized, and our fox was among those pursued by the huntsmen. A bullet hit him, and suddenly a schoolmaster was lying there before the bewildered huntsman. The bullet had struck the fox strap and ripped it apart.”

Witches were also supposed to be able to transform themselves into hares, cats, dogs, even geese in European folklore. In other parts of the world, though, folklore is full of people who can turn into different animals, and the animals are always ones local to the area. In various parts of Africa there are stories of people who transform into hyenas, leopards, and lions, while in various coastal areas of the world there are stories of seals, orcas, dolphins, and other water animals that can transform into people or which are humans in disguise.

The nagual is a story from many places in Mesoamerica, dating back to the ancient Aztecs and Olmecs and other people who lived in what is now Mexico and parts of Central and South America. The nagual was supposed to be someone who could shapeshift into a jaguar. Some people today still believe in the nagual the same way some people still believe in werewolves, and like many other shapeshifters it’s often connected with witches. Modern nagual stories are about witches who can transform into various animals at night, including owls, bats, turkeys, pumas, and even wolves. In some stories they’re thieves and murderers, while in other stories they help people.

Of course, not all folktales about shapeshifters are spooky. Sometimes they’re just meant to be funny, like this story from India.

Once there was a boy who herded buffaloes, and he noticed that at noon every day a dog would visit some nearby pools of water in a little valley. One day he hid to watch the dog. To his surprise, when the dog reached the water, it took its skin off and out stepped a beautiful young woman! She bathed in the pool, then put her dog-skin back on and left. The boy followed her to see what house she went to, then went back to watching his buffaloes.

Later that year the boy’s parents decided it was time for him to marry and began to look for a wife for him. But he told them he wanted a dog as his wife and even had a particular dog picked out. Everyone laughed at him, but he was determined to marry the dog and so his parents agreed.

The wedding took place and that night the new bridegroom pretended to fall asleep, and when the dog got up he watched to see what she would do. She took her dog-skin off and started to leave the house, but the groom jumped up and threw the dog-skin on the fire, where it burned up. His wife remained in her human form and they lived happily ever after.

Here’s another story, this one from Korea and published in 1911. Once a very poor old couple lived on the edge of a town, where they grew just enough rice to keep from starving. The old man caught fish to sell for extra money, but one day when he went to the lake, it was almost dried up and all the fish were gone. In the middle of the lake was a giant frog.

The old man shouted at the frog, “How dare you drink up the lake and eat up all the fish!” But the frog said, “You’ll thank me for it one day. Take me home and let me live in your house, and you’ll see how lucky you’ll be.”

The old man didn’t know what to do. Without the water from the lake, his rice would die, and without the fish from the lake, he had nothing to sell. He took the giant frog home.

The old man and his wife gave the frog the best room in their small house and the best food they had. In return, the frog turned out to be a very pleasant lodger and would talk and laugh with the couple long into the night, telling stories and singing songs.

After a week, the frog said he needed to take a wife, but she had to be beautiful and of noble birth. The old man went to the town’s magistrate, whose youngest daughter was the most beautiful woman in the land, and explained that a giant frog would like to marry the magistrate’s daughter.

The magistrate laughed at first, but when he realized the old man was serious, he ordered him to be beaten. But immediately, hail began to fall from the sky—first tiny hailstones, then bigger and bigger ones. The magistrate hastily changed his mind and said his daughter could marry the frog, and the hail stopped.

In this time and place, a bride went to her wedding with her eyes closed and painted over with wax so she couldn’t see her husband until after the ceremony. Imagine the bride’s horror, after the wax was removed and she took her first look at her new husband, when she discovered he was a giant frog! The bride was furious, but the frog said, “You’ll be glad you married me. Will you take these scissors and loosen the skin of my back? It’s too tight and hurts me.”

The bride was so angry that she took the scissors and cut the frog’s skin open all the way down his back. Then, to her astonishment, he wriggled right out of his skin and out stepped a handsome prince wearing fine silk clothes. He had been enchanted and the spell could only be broken when he married a human woman. He and his wife lived happily ever after, and the poor old couple who had helped him were given all the riches they desired and lived in a palace to the end of their days.

I could keep going forever, because there are a whole lot of stories about shapeshifters from around the world. If you want more folktales, I recommend the podcast “Sandman Stories Presents.” Each episode is another folktale. It’s really interesting and the host’s voice is soothing if you need a podcast to help you fall asleep.

Outside of folklore and mythology, shapeshifters aren’t real. To understand why, we have to look at a very different animal, the butterfly—or, since this is a Halloween episode and most moths are nocturnal, the moth. Let’s learn about an especially Halloween-y moth, the African death’s-head hawkmoth. It gets its name from a pattern on its back that looks sort of like a human skull. Its upper wings are black and its lower wings are usually yellowy-orange. Its wingspan is as much as 5 inches across, or 13 cm. It lives in parts of Africa and migrates to Europe for the summer.

The deaths-head hawkmoth caterpillar can grow up to 6 inches long, or 15 cm, and has a curved horn-like structure basically on its butt. After it hatches, it spends the next month or two eating leaves, especially the leaves of potato and tomato plants. During this time it will go through five stages of development, called instars, where it sheds its skin and grows larger. Finally, the caterpillar burrows into the ground and forms a little nesting chamber in the dirt. For the next few weeks it just sits in the chamber while moisture evaporates from its body and it forms a hard shell-like structure called a pupa.

Inside the pupa, the caterpillar transforms into a moth by breaking down its own body with digestive juices. The resulting goo of undifferentiated cells reforms into a moth body, a process that takes weeks. Finally the newly formed moth emerges from the shell of its pupa and from the ground, climbs onto a leaf or twig, and hangs there for a little while as its wings uncrumple and extend to their full size.

The transformation of a moth or butterfly, or other insects that go through the same process, is astounding and not fully understood. What we do know is that it takes massive amounts of energy. A caterpillar eats all the time in order to store up energy to metamorphose into a moth or butterfly. If there was an easier way, for instance if a caterpillar just had to cast a magic spell or put on a mothskin coat to transform, they would do it the easy way. But they don’t, because this is the most efficient way to transform from one body to another that nature has developed. It takes weeks, it’s messy and dangerous because the animal is helpless the whole time, and it only happens once in an insect’s lifetime.

So that’s that. Werewolf movies are a lot of fun to watch, especially this time of year, but you don’t have to lie awake at night afterwards worried that a werewolf is going to bite you.

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. If you like the podcast and want to help us out, leave us a rating and review on Apple Podcasts or Podchaser, or just tell a friend. 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. There are links in the show notes to join our mailing list and to our merch store.

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