Episode 214 – Panther Chameleon: The Color King

“…and today we’re talking about a reptilian mood ring. But more on that later.”

You ain’t been blue till you’ve had that mood indigo? Maybe you’ve experienced red hot anger. For humans, it’s mostly metaphor, but there’s one animal that does display real mood-ring-like qualities. The chameleon is an alien looking reptile, a fact that makes it famously photogenic and a highly sought after exotic pet. But with fame comes misconceptions. The panther chameleon has an amazing talent that few people actually understand. But even creatures that seem alien are natural parts of Life, Death, and Taxonomy. 

 Description of the Panther Chameleon

Karma is a squat-bodied lizard with a vertically flat torso, large head, and long-curved tail.

Its triangular head juts straight out from its body and has a short ridge rising from its skull. Its head is also flanked by two massive eyeballs that stick out from their sockets.

These eyes are almost completely covered with their scaled eyelids, leaving only the pupil exposed. So it doesn’t have a lot of peripheral vision. To make up for this, it can rotate its eyes in a 180-degree arc. Plus its eyes can move and focus independently of each other, meaning it has a full 360-degree range of vision and can look at two different objects at the same time.

They also have good depth perception despite only seeing things with one eye at a time. This is because they don’t use stereopsis like we do (joining images from two eyes to judge distances), but they use monocular depth perception. This allows them to see small insects more than 30 feet away. That’s like seeing a hamster clearly from over 115 feet away for humans.

Chameleons actually have the highest magnification for their size of any vertebrate in the animal kingdom.

Chameleons also have knobbly legs with five-toed feet at the ends. Their toes are split into two groups – three on one side and five on the other – leading to a forked appearance (hence the furcifer part of their name) and this allows them to grip branches really well.

Their tails are long and prehensile, meaning they are controlled intentionally like a finger. A dog’s tail is basically just a furry meat stick they wag back and forth, so it’s not prehensile. However, a capuchin monkey can wrap its tail around branches and even pick things up, so it’s prehensile like the Chameleon’s.

They can see ultraviolet light and it even changes their social and mating behaviors. Lastly, their tongues are just like a frog’s. They fling their stickly tongues out at insects in 0.07 seconds. It accelerates from 0 to 60 in 1/100 of a second – twice as fast as the fastest car.

Measure Up

Welcome to the beloved Measure Up segment. The official listener’s favorite part of the show! The part of the show when we present the animal’s size and dimension in relatable terms through a quiz that’s fun for the whole family. It’s also the part of the show that’s introduced by you when you send in audio of yourself saying, singing, or chittering the words Measure Up into ldtaxonomy at gmail dot com. We don’t have a new Measure Up intro! 

  1. Humpback whale
  2. Orca
  3. Baluga
  4. Whale shark


  • 16 – 20″ (40 – 51cm) long
  • How many panther chameleons go into the longest single journey taken by a mammal?
  • Hint: The journey is taken by the humpback whale that travels vast distances in search of food. A female was sighted off the coast of Brazil in August 1999 and it was later photographed in Madagascar in September 2001. 
  • 19,289,952 chameleons. The journey is 9,800 km (6,089 mi) long.

Male Weight

  • 200 – 220 grams (7.05 ounces)
  • How many chameleons go into the heaviest bird of all time?
  • Hint: The bird is Aepyornis maximus or the giant elephant bird, which once lived in madagascar. It looks similar to an emu but it’s actually a close relative to the kiwi. 
  • 2,045 chameleons. The bird was 450 kg (1,000 lb).

Fast Facts about the Panther Chameleon

  • Rang.: Lives in the forests of northeastern Madagascar
  • Diet. In the wild, they usually eat mainly insects like worms, grubs, crickets, and grasshoppers. People often keep them as pets and feed them roaches, silkworms, and wax worms
  • Behavior. They usually live about 3-6 years with females living only about 3 due to the strain of laying eggs.

Major Fact: Mood Ring Reptiles

We’ve mentioned before that the chameleon is thought to change colors to match their surroundings, but that’s actually a common misconception. In fact, there are several factors that trigger the color change, including light, mood, temperature and potentially sheer force of will. 

Why do they change their color?

They are thought to change colors for two reasons and the first is communication. They are relatively solitary animals, but they do come together when it’s time to mate. When two males come together, they will puff themselves up and change color to establish dominance with the loser changing to a dull dark color. 

They also change colors to manage thermoregulation. As cold blooded animals, controlling body temperature is essential. Darker colors allow them to absorb more heat and brighter colors reflect more light and heat. The changing colors allows them to fine tune more than just sitting on a warm rock.   

Of course when it comes to camouflage, they have pattern disruption and countershading like other animals.

How do they change color? 

Their color change can be stark, but it’s not as sophisticated as some cephalopods. And it’s a completely different mechanism. 

Cephalopods primarily use chromatophores, but chameleons use something called iridophores. Iridophores aren’t pigments. Instead, they are crystalline structures that change shape. When they are at rest, they are an iridescent blue. When these crystals are excited, they change shape and change the wavelength of light that they reflect. When they are calm, the crystals bunch together. When they are stressed or excited, the crystals loosen, reflecting reds, yellows, and white.

There’s a second layer of iridophores that acts as a sun shield that the lizard can adjust to let in more or less sunlight. 

We don’t know exactly how they control this, but it’s likely hormonal or neuronal.

But that’s not all. Panther chameleons have several layers of skin that aid in color changing. Including both iridophores and chromatophores.

  • The top layer is a mix of xanthophores, which produce yellow, and erythrophores, which produce red-orange.
  • Iridescent, light producing iridophores are also mixed into the top layer.
  • Next is the reflective iridophore layer, for thermoregulation.
  • Finally, is a brown melanophore layer. 

So they change their actual skin color with the chromatophores, but they also adjust how you see those pigments by adjusting the iridophores. Green is an example of how they work together. Without the iridophores, chameleons would be red, yellow, or brown. But to make green, they change their skin pigment to yellow with the top layer of chromatophores and relax their iridophores to produce a blue light, creating green. 

Finally, and less related. If you shine a UV light on a chameleon in the dark they will glow, but not their skin. Their bones.

Episode 186 – Komodo Dragon: A Toxic Debate

“…and today we’re talking about the closest thing to a traditional fire breathing dragon we’re going to get.”

Reptilians once dominated the food chain as the largest animals in their ecosystems until some natural checks and balances relegated them to smaller bodies that were better at sneaking under rocks and bushes. But nature’s memo failed to reach one island in Oceania. The Komodo dragon is a giant that lives at the top of their ecosystem, capable of taking down even large prey animals. But these unique lizards may have a tool up their sleeve besides their size. But pairing a high weight class with some unique talents is the best way to rule in Life, Death, and Taxonomy.  

Episode 174 – Shield-Tailed Agama: The Aegis Posterior

“…and today we’re talking about a spike-covered tush that lives out in the bush. But more on that later.” 

The subterranean lifestyle has it’s benefits and many small animals make their beds below the earth. From the sleeping cicada to the idle fox, the shelter of a sand and soil roof provides protection from predatory prowlers. But there’s one flaw in this tactic. What if someone or something can fit in your hiding place? The shield-tailed agama isn’t willing to leave any attack unprepared for. He’s developed an interesting way to enter dreamland free of the fear of tunnel-going hunters. But covering all your bases is one way to beat insomnia in Life, Death, and Taxonomy.

Episode 169 – Tuatara: This is Not a Lizard

“…and today we’re talking about something that looks just like an iguana but it’s apparently not a lizard at all.”

Scattered along the northern coast of New Zealand’s north island is a living fossil that was thought to be extinct: the tuatara. A laid-back lizard with a lazy lifestyle, the tuatara spends most of its time getting some sweet vitamin D in the sun and using the introspective sight of its peculiar third eye. But having insight can help with more than just character development here in Life, Death, and Taxonomy.

Episode 164 – Sailfin Dragon Lizard: The Icarus Iguana

“…and today we’re talking about a modern day dinosaur with a name to match. But more on that later.”

Lizards sometimes retain primordial qualities. To look at them, you may see the scaly faces of ages long gone. The sailfin dragon lizard has a look that matches it’s fantastical name. But the dinosaur-esque nature of this reptile doesn’t mean it doesn’t have a few new tricks in it’s arsenal. This dragon makes its home in near the water, and he brings some interesting adaptations to the taxonomic table. Improving on the tried and reptile design might be the best option for this aqua-dragon in Life, Death, and Taxonomy. 

Episode 150 – Spider-Tailed Horned Viper: The Crafty Serpent

“And today we’re talking about something we were supposed to talk about a few weeks ago but we goofed and now we’re talking about it now. More on that now.”

Hunters have all kinds of methods to help catch their prey. There’s ambushing, stalking, and brute force. But one of the most clever ways may be luring. Snakes are usually predators of the ambush varieties, though they’ll engage in a stalking or two. But one dessert viper has been known to employ a lure that would make the most experienced fishermen blush. But anatomical trickery may be the key to this serpent’s survival in Life, Death, and Taxonomy.

Episode 144 – Horned Viper: The Vied Viper

“…and today we’re talking about an animal that has adapted to a legless lifestyle in an arid region. But more on that later.”

Cursed to crawl on their bellies, snakes have taken to the limbless life with seemingly listless languid movement. But these apparently listless articulations of their sinuous bodies, are done with great intention. Snakes are able to slither almost everywhere. Without claws, legs, or arms that can climb trees, slide across the ground, and some can even glide on the air. But the horned viper is posed with a particular challenge in the form of soft shifting sand. But laudable locomotion is an interesting way a serpent can make its way through Life, Death, and Taxonomy. 

Episode 132 – Water Anole: Squamata in the Wata

“Thank you to Casy for our new theme song. Hear more of Casy’s music by searching Casy Michelle on Youtube. Today we’re talking about a familiar looking lizard with an unfamiliar amazing ability!”

From the time of Alexander the Great, air breathers have been fascinated by the world beneath the waves. And humans aren’t the only ones to figure out how to hang out underwater. The water anole uses a special technique to stay hidden when predators come sniffing that scientists still haven’t entirely figured out yet. But being elusive, mysterious, and resourceful is the name of the survival game here in Life, Death, and Taxonomy.