Episode 271: Springtime Animals

Pre-order your tiny pin friend via our Indiegogo campaign!

This week we talk about some springtime animals! Sort of! Thanks to Derek and Nikita for their suggestions!

Happy birthday to Lillian, Hannah, and Derek! What a busy birthday week! Everybody gets cake!

Further reading:

Tales from Tennessee

There’s more than one way to grow a beak

A male river chub. “It’s not funny guys, put me down guys” (photo by Bill Hubick):

Busy busy busy building a big big nest (photo from site linked to above):

Got a rock (photo from site linked to above):

One bilby:

Two bilbies:

Easter bilbies not bunnies:

Egg tooth:

The red jungle fowl is the wild ancestor of the domestic chicken:

Modern domestic chickens:

Show transcript:

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

It’s springtime in the northern hemisphere, with spring festivals like Easter coming up fast. This week let’s look at three animals that represent springtime, sort of. Thanks to Derek and Nikita for suggesting two of the animals we’ll learn about this week!

Before we start, though, two things! One, I’m running a little crowdfunding campaign to have some enamel pins made. I won’t spam you about it like our big Kickstarter for the book last fall, but there will be a link in the show notes if you want to take a look. There are three designs, a narwhal, a capybara with a tangerine on its head, and a not-terribly-accurate thylacine. The campaign is called Tiny Pin Friends and it’s on Indiegogo.

https://www.indiegogo.com/projects/tiny-pin-friends/x/2964999#/

Two, it’s birthday shout-out time! This week we have not one, not two, but THREE birthday shout-outs! You know what that means, of course. It means we all need to be celebrating all week! A great big happy birthday to Lillian, Hannah, and Derek! And yes, birthday Derek is the same Derek who suggested one of the animals this week!

In fact, let’s start with his suggestion, a fish called the river chub. It’s a little fish that only grows a little over a foot long at most, or 33 cm, although it’s usually much smaller than that. It’s common in fast-moving streams and rivers throughout North America, especially in the Appalachian Mountains and surrounding areas.

The river chub isn’t all that exciting to look at, unless of course you’re a fish enthusiast or a river chub yourself. It’s greenish-silver above and pale underneath with orange fins. Males are larger than females and during breeding season, in late spring, the male turns purplish-red, his head enlarges, and he develops tubercles on the front part of his head that look sort of like white rhinestones.

His physical changes aren’t just to attract a mate. The male river chub builds a pebble nest by picking up little stones and moving them to just the right spots, so by having a more robust head and broad mouth, he can pick up bigger stones. And he picks up a LOT of stones, as many as 10,000 of them, which he arranges and rearranges.

Females are attracted to well-made nests. After a female lays her eggs in the nest, the male fertilizes the eggs and then spends the next week or so defending them by head-butting other males and potential predators, until the eggs hatch into larvae.

The pebble nests help other animals too. Over 30 species of fish use the nests as spawning sites once the river chub’s eggs hatch. Good job, river chub, helping out all those other fish!

Next, a while back Nikita suggested we learn about the bilby. It’s not springtime right now in Australia where the bilby lives, but the Christian holiday of Easter is still celebrated at the same time as it is in the northern hemisphere. Instead of chocolate Easter bunnies, in Australia they also have chocolate Easter bilbies.

In 1968, a nine-year-old girl named Rose-Marie Dusting wrote a story called “Billy the Aussie Easter Bilby.” When she grew up, Rose-Marie published the story as a picture book, which became popular enough that it inspired people in Australia to start talking about the Easter bilby instead of the Easter bunny. Starting in 1991 there was a big push to change from Easter bunnies to bilbies. Rabbits are an invasive species in Australia and do a lot of damage, and in fact they’ve almost driven the bilby to extinction. The lesser bilby did go extinct in the 1950s but the greater bilby is hanging on despite introduced predators like cats and foxes, rabbits and other introduced animals that eat all their food, and habitat loss.

The bilby has silky fur that’s mostly gray in color, and it has long pink ears that look sort of like a rabbit’s. It’s sometimes called the rabbit-eared bandicoot because of its ears. It has a long, pointy muzzle that’s pink and a long tail that’s black with a white tip, and it’s about the size of a cat but with shorter, thinner legs. It has a good sense of smell and good hearing, naturally, but its big ears are also useful for shedding heat. This is important since it often lives in hot, dry areas.

The bilby is nocturnal and spends the day in one of several burrows it digs in its territory. Not only are the burrows up to almost 10 feet long, or 3 meters, but they can be up to 6 feet deep, or 2 meters, with multiple exits. Digging such large, deep burrows not only keeps the bilby cool on hot days, it helps improve soil quality and provides shelter for lots of other animals that move in when the bilby isn’t home.

The bilby eats a lot of plant material, including seeds, fruit, bulbs, and tubers, along with eggs and various types of fungus, but it also eats insects, spiders, grubs, snails, and other small animals. It gets all of the moisture it needs from its diet. Its tongue is long and sticky, which helps it gather termites and other insects more easily, and its ears are so sensitive that it can hear insects moving around underground. It will actually put its ear to the ground to listen, then dig the insect up.

A mother bilby usually has one or two babies at a time that stay in her pouch for a little under three months. Her pouch is rear-facing so that sand and dirt don’t get onto her joeys when she digs a new burrow. Once her joey leaves the pouch, she hides it in one of her burrows and comes to feed and take care of it for another few weeks, until it’s ready to strike out on its own. In a lot of marsupials, the joey will come and go from the pouch as it grows older, but by the time the bilby’s joey is ready to emerge from the pouch, she already has a new baby or two ready to be born, so she needs her pouch for the new joeys.

Sales of some brands of chocolate Easter bilbies raise money to help bilby conservation efforts. And here I thought there was no way to improve on chocolate.

We’ll finish with the humble domestic chicken. Chickens are symbols of springtime because that’s when they start laying a whole lot of eggs. Most birds only lay eggs after mating, but chickens have been selectively bred so that the females, called hens, start to lay unfertilized eggs once they’re adults. The eggs you buy at the grocery store are unfertilized. Some people think those little whitish strings on either side of the yolk are embryonic baby chicks, but that’s not the case. Those strings are called chalazae [ka-LAYzee] and they help keep the yolk from moving around too much inside the egg.

Modern domestic chickens are descendants of wild birds called jungle fowl that evolved in parts of Southeast Asia some 50 million years ago. Humans domesticated the red jungle fowl at least 8,000 years ago, probably independently in different areas, and they’ve spread around the world as people migrated from place to place. The red jungle fowl is still around in the wild, too. It looks like a chicken.

Like all birds, jungle fowl descended ultimately from theropod dinosaurs. This included Tyrannosaurus rex, which means you’ll occasionally hear people say that chickens are direct descendants of T. rex. While chickens and other birds are related to T. rex, you wouldn’t find a T. rex in a chicken’s direct ancestry even if you could follow it back 66 million years, although you would find much smaller theropods. You’d have to go back farther than 66 million years, though, because paleontologists think theropods started evolving bird-like features some 160 million years ago.

You may have heard the saying, “That’s as scarce as hen’s teeth” to indicate something that’s not just rare, it’s basically non-existent. That’s because chickens, like all modern birds, don’t have teeth. Most birds and reptiles do grow what’s called an egg tooth, which actually looks like a little spike at the tip of the bill, or the nose in reptiles. It helps the baby break out of its egg, after which it either falls off or is reabsorbed. But it’s not a real tooth.

In late 2020 paleontologists announced they’d found a fossil skull on the island of Madagascar, dated to 85 million years ago, that shows an animal with a beak. The animal resembles a small theropod dinosaur in some ways and resembles an early bird in other ways, but it has features never before seen in either. Its snout is elongated but deep with a heavy bill that looks a little like a toucan’s bill. The bill doesn’t have teeth along the jaws, although other early birds found from around the same time do. That means that not only did birds stop needing teeth as early as 85 million years ago, toothlessness must have evolved repeatedly in various species. However, the new animal’s beak does have teeth at the very tip of its mouth.

Recent research suggests that birds and their ancestors evolved toothless beaks instead of toothy snouts because they had such specialized diets. There were probably also other benefits to having beaks instead of teeth. Some research suggests it might have helped speed up egg hatching. Other studies suggest the lack of teeth lightened the bird’s head and improved flight.

Occasionally a chicken embryo bears a recessive trait called talpid. It’s a lethal mutation, but talpid chick embryos do sometimes live in the egg for a couple of weeks before dying. Genetic researchers study talpid chickens for various reasons, and at one point a researcher named Matthew Harris noticed something odd on the beak of a talpid chicken embryo. It had tiny bumps along the edge that looked like teeth.

Harris took his findings to biologist John Fallon, who verified that the structures are actually teeth, not just serrations. They develop from the same tissues that form teeth in mammals, but the teeth don’t resemble mammal teeth. Instead they’re conical and pointy like a dinosaur’s teeth.

Harris eventually engineered a virus that mimicked the mutation’s molecular signals. Introducing the virus into chickens without the talpid mutations resulted in the chickens developing teeth, although they were reabsorbed into the beak after developing.

So I guess hen’s teeth are still as scarce as hen’s teeth. Also, I don’t really know how we made it here from springtime animals, but here we are.

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 154: Some Australian animals and how to help

This week let’s learn about some lesser-known Australian animals. A heat wave and dry conditions have led to many terrible bush fires in Australia, with many animals and people left hurt, killed, and homeless. Fortunately, there are ways you can help!

Check out the Animal Rescue Craft Guild for patterns and other information about crafting pouches, beds, and other items needed for injured and orphaned animals, and where to send the items you make.

Animals to the Max has a great episode about the fires and a long list of places where you can donate money where it’s needed most.

Some rescued joeys chilling in their donated pouches:

An Eastern banded bandicoot:

A bilby:

A long-nosed potoroo:

The woylie, or brush-tailed bettong:

The numbat:

Show transcript:

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

As you’ve probably heard, there are terrible fires sweeping through many parts of Australia right now amid a record-breaking heat wave. Both the fires and the heat have killed an estimated half a billion animals in the last few months. This week we’re going to learn about some lesser-known Australian animals and also talk about ways you can help the people in Australia who are helping animals, even if you don’t have any money to spare.

A Facebook group called the Animal Rescue Craft Guild is the resource for anyone who wants to make needed items for injured or orphaned animals. I’ll put a link in the show notes. The group shares what items are needed, patterns to make them, information about what fabrics and what fibers are appropriate for which items, and where to send them.

In the last week I’ve been knitting and crocheting nests for small animals, and this weekend my aunt Janice and I will be sewing pouches for larger animals. Well, Janice will be doing the sewing, I’ll cut out the cloth pieces for her to use. Many of the animals rescued from the fires are young marsupials, called joeys, whose mothers died, so the pouches are for joeys to live in until they’re old enough to be on their own. Being in a pouch makes the joey feel safe because it feels like being in its mother’s pouch. Rescue groups in Australia need all sizes and kinds of pouches, because there are so many different species of marsupial animals in Australia. So let’s learn about a few you may not have heard of.

One Australian marsupial that a lot of people don’t know much about is the bandicoot. There are a number of different species that live in parts of Australia and New Guinea. Some are exclusively herbivorous while some are omnivores. For instance, the Eastern barred bandicoot lives on the island of Tasmania and has recently been reintroduced into its historic range in Victoria in southeastern Australia. It’s still quite rare and threatened by introduced predators like foxes and by diseases. It’s an active animal and a fast runner, and makes a happy grunting noise when it finds food.

The Eastern barred bandicoot is about the size and shape of a rabbit but with shorter ears and a long nose that it uses to probe into the soil to find worms and other small animals that it then digs up. You can tell where one has been because it leaves a series of little holes in the ground called snout pokes. It’s light brown with darker and lighter stripes on its rounded rump, and has a short mouse-like tail. The Western barred bandicoot is a little smaller than the eastern but looks and acts very similar. Both are nocturnal and solitary, and spend the day sleeping in a nest lined with grass and leaves. When it rains, the bandicoot pushes dirt over its nest to help keep it dry. It eats plant material like seeds and roots as well as small animals like insects, worms, and snails. If something startles it, it will give a big jump, and as soon as it comes down it digs a burrow to hide in. Its pouch faces backwards so dirt won’t get into it when it digs.

Scientists are still working out what other animals the bandicoot is closely related to and how the different species are related to each other. It doesn’t help that many bandicoot species are already extinct. We do know that the bandicoot is most closely related to an animal called the bilby.

The bilby looks even more like a rabbit than the bandicoot does, and in fact sometimes it’s called the rabbit-bandicoot or the rabbit-eared bandicoot. Its fur is silky and slate gray on the back with white underneath, and it has a long nose, long ears, little pink paws, and a long tail. It grows to about 22 inches long, or 55 cm, not counting the tail, which is another 11 inches long, or 29 cm. Males are generally considerably larger than females. It even hops sort of like a hare.

There used to be two species of bilby, but the lesser bilby went extinct in the mid-20th century. The greater bilby is vulnerable due to habitat loss and introduced animals likes foxes and cats, but conservation efforts are underway with captive breeding programs and reintroduction of bilbies into areas where they used to live. There’s also a push to educate people about the bilby, and instead of chocolate Easter bunnies, a lot of people in Australia have started giving each other chocolate Easter bilbies.

The bilby is an omnivore and eats seeds, fruit, plant bulbs, insects, worms, and other small animals. Its large ears contain lots of blood vessels close to the surface. As blood travels through the ears, it radiates heat and returns to the heart much cooler than before, which helps cool the whole body.

The bilby sleeps in a burrow during the day, usually alone or with a few other bilbies, and it digs tunnels to connect different burrows throughout its territory. Like the bandicoot, its pouch faces backwards so dirt won’t get in it. Some bilbies may have a dozen burrows and will dig a new one every few weeks, which is helpful to other species of animal too since other animals may move into old bilby burrows.

The potoroo is another animal that people outside of Australia may not know about. It’s related to kangaroos and wallabies, but looks more like a rodent with a long, thin snout that curves downward. It’s brown with small ears and a thin tapering tail, and its hind legs are longer than its front legs so that it hops like a little kangaroo with its front feet tucked to its chest.

All species of potoroo are endangered even though when European settlers first arrived, it was a common animal all over Australia. Gilbert’s potoroo is so critically threatened that it’s estimated that only 70 are still alive today. In fact, it was suspected to be extinct until a small population was discovered in 1994. The long-footed potoroo was only discovered when one was caught in a trap in 1967. The long-nosed potoroo is less endangered than the other two species, but it’s still threatened by habitat loss, fires, and introduced predators like foxes, cats, and dogs.

The long-nosed potoroo grows to about 15 inches long at most, or 38 cm, with a tail about nine inches long, or 24 cm. Like the bandicoot and bilby, it’s nocturnal, solitary, omnivorous, and digs for a lot of its food. When it’s foraging, it sniffs the ground while moving its head side to side, and when it smells something it wants to eat, it digs to find it. It eats seeds, fruit, flowers, some leaves, and insects and other invertebrates, but it especially likes fungi like mushrooms.

Another little-known Australian marsupial is the bettong, also called the rat kangaroo. It’s related to potoroos and therefore to kangaroos, and looks similar. There are five species, all of them about the size of a rabbit. It hops on its hind legs and has a tail about the length of its body, specifically up to 15 inches, or 38 cm. Its fur is grey or brown, sometimes reddish. It’s nocturnal and solitary and sleeps in a nest during the day, much like the bandicoot. But since it has a prehensile tail, it actually carries its nesting material to the nest with its tail. Since it often lives in desert areas, it digs a warren of burrows and tunnels to stay out of the heat. Like the potoroo, it especially likes to eat mushrooms, but it will eat a lot of plant materials as well as invertebrates.

The woylie, or brush-tailed bettong, is one of the rarest species. It sometimes collects seeds of the Australian sandalwood tree to eat later, burying them in shallow holes. Like squirrels burying acorns, sometimes the woylie forgets where it hid the seeds and they germinate to grow into new trees.

Several species of bettong are threatened by habitat loss, fire, and introduced predators, but there are conservation plans in place to protect the bettong and its habitat.

The last animal we’ll learn about today is the numbat, which sounds like a Pokemon but which is a marsupial related to the extinct thylacine. It’s brown, gray, or reddish with white stripes over its back and rump, and a black streak through its eye, which also has a white ring around it. It grows to almost a foot long, or 29 cm long, with a long bushy tail that adds another eight inches to its length, or 21 cm.

The numbat eats termites and only termites. Termites are soft, so although the numbat has lots of little peg teeth—fifty of them, although sometimes less—it doesn’t need them. Its jaw is weak as a result but it has a long tongue with sticky saliva to lick up termites, and the roof of its mouth is ridged to scrape the termites off its tongue. Then it just swallows them.

The numbat needs to eat up to 20,000 termites every single day. Most marsupials are nocturnal, but the numbat is active during the day since it needs to be awake when the termites are active. It has good eyesight too, unlike many marsupials. It hunts termites by both sight and smell, and digs into the shallow tunnels termites dig outside of their nests. A termite’s nest is too tough for the numbat’s small claws to damage, but the tunnels leading away from the nest are easy for it to uncover.

At night the numbat sleeps in a burrow or sometimes in a hollow tree. Its burrow is usually a long tunnel that ends in a cozy round nesting chamber that it lines with grass, leaves, feathers, flowers, and other soft items. Its rump is protected by especially thick skin, and if a predator tries to get into its burrow, it will block the entrance with its rump. It can also climb trees with its sharp claws.

Male numbats have a scent gland on the chest that starts exuding a smelly oil during the summer, which it uses to mark its territory. The smell attracts females and warns other males away. Babies stay in their mother’s pouch for six months or so, until they’re so big the mother can’t walk properly. At that point she dumps them in the nest although she continues to nurse them. A few months after that the babies start to eat termites instead of just milk.

Like the other animals we’ve talked about today, the numbat is threatened by habitat loss and introduced predators, especially foxes and cats. But conservation programs have helped its numbers increase, and it’s been reintroduced into areas where it once lived.

Australia cares about all its animals, little and big, and I know that you care about animals too, or you wouldn’t be listening to this podcast. It’s easy to feel helpless when you hear the news about so many animals dying in fires. But there are ways you can help. Even if you don’t know how to sew, knit, crochet, or do woodworking, you probably know someone who does. Just ask them to teach you how. You’d be surprised at how easy it is to learn, and the patterns posted on the Facebook group I link to in the show notes are all quite simple. For the lining of most pouches, you can use old flannel sheets or even cotton t-shirts, as long as it’s clean, soft, and has no frayed or pilled areas. The outer layer of the pouches can usually be ordinary cloth, and some of the outer pouches can be knitted from regular old acrylic yarn.

If you aren’t able to craft, or you don’t have access to craft materials, you can raise money to donate to wildlife rescue groups in Australia. Check with any groups you may already belong to, like your place of worship, book clubs, gaming groups, your school or college, even your employer. Many groups may be interested in holding a bake sale or yard sale, or just gather donations from members to send to Australia. Last week’s episode of the great podcast Animals to the Max had an interview with an Australian wildlife expert, so I’ve linked to it in the show notes so you can listen if you haven’t already, and because that episode’s show notes have lots of great links where you can send donations.

Whatever you do to help, the people and animals of Australia appreciate it! Even if all you can do is learn about Australian animals so you can share that knowledge with other people, everything helps.

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

Thanks for listening!