Episode 467: The Dragon Bird and Friends

Thanks to Audie, Katie, Eilee, Emily, Maryjane, and Dylan for their suggestions this week! Sorry this episode is late–the site was down. 🙁 Further reading: Bobolinks A frill-neck lizard showing off: A bobolink: The great-eared nightjar [picture by Venkata Shreeram Mallimadugula, taken from this site]: Another great-eared nightjar [Picture by Nigel Voaden from UK – Great Eared-Nightjar, Tangkoko, Sulawesi, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=39857392]: Show transcript: Welcome to Strange Animals Podcast. I’m your host, Kate Shaw. This week we have an episode about some birds and reptiles. Thanks to Audie, Katie, Eilee, Emily, Maryjane, and Dylan for their suggestions! If this episode showed up later than usual in the podcast feed, it’s because I’ve been having trouble with the website and couldn’t get it uploaded until it was fixed. We’ll kick off the episode with an animal that can’t kick, because snakes don’t have any legs. Audie suggested we learn about the scaleless rat snake, which means that first we have to learn about the rat snake, the ordinary one with scales. Rat snakes are constrictors and are common throughout many parts of Asia, Europe, North America, and the Middle East, and they’re called rat snakes because they eat rats and other small animals like lizards, frogs, and baby birds. Rat snakes are popular pets because they’re so pretty and they aren’t dangerous to humans. Different species are different colors and patterns, and the rhinoceros rat snake, also called the Vietnamese longnose snake, even has a little hornlike projection on the tip of its nose that points forward. I’m pretty sure we’ve talked about that particular rat snake before on the podcast, but I can’t look up which episode because the website is down. Most rat snakes don’t grow much bigger than 5 feet long, or 1.5 meters, but a few species can get longer than that. The black rat snake, which lives in North America, can grow over 8 feet long, or more than 2.5 meters. It’s black with small white markings on the head, but snakes bred for sale as pets are sometimes white all over or partially white, or even albino, meaning an individual has a mutation where its body doesn’t produce pigment. Pet black rat snakes are also bred that don’t have scales. That brings us to the scaleless rat snake. It’s an ordinary rat snake but it has a mutation that causes it to have very few scales. This is a mutation that happens occasionally in the wild since it’s a recessive trait, and while it can make the snake a little more vulnerable to injury, scaleless snakes can survive just fine in the wild. They do have belly scales like a normal snake, which are the ones that allow them to move around, and they may have a scattering of scales on other parts of the body too. A scaleless snake still sheds its skin once a year like an ordinary snake, since it’s actually the outer layer of skin that sheds along with the scales. Scaleless rat snakes are popular as pets because they’re so soft and because their coloration is usually very bright. A snake’s coloration comes from pigments in its skin. A snake’s scales are actually transparent, so without a layer of scales, a scaleless snake looks even more colorful than a regular snake. Many species of snake have been found in the wild that are scaleless, but it seems to be a little more common in rat snakes. Next, Dylan and Emily wanted to learn about the frill-neck lizard, which is found in northern Australia and the very southern part of New Guinea. It’s a big lizard that can grow almost three feet long, or 90 cm, including its incredibly long tail. Males are larger than females on average, with a bigger frill. The frill is a flap of skin around the head and neck, and most of the time it’s folded back over the neck and shoulders so it’s not that noticeable. The lizard is pretty ordinary-looking that way, just a big gray or brown animal with a big head. But when the lizard feels threatened, or if it comes across another frill-neck lizard, it can extend the frill by moving the small bones and cartilage that act as struts, which also requires the lizard to open its mouth. When extended, the frill is as much as a foot across, or 30 cm, and it’s marked with bright colors. Different individuals have different colored frills, red, orange, yellow, or white, or a mixture of colors and patterns. The size and color of the frill opening up so quickly will often startle a potential predator, allowing the lizard to escape. The frill-neck lizard can even run on two legs if it needs to, although it has to run with its head pointing straight up in the air. The frill-neck lizard mostly eats insects, especially termites. It spends most of its time in trees and some people believe it can use its frill as a parachute, but that doesn’t actually seem to be the case. Let’s move on to a few birds next. Maryjane suggested we learn about ...