Chameleons can project their tongue up to 2.2 times their body length.
Trioceros schubotzi can be found at elevations as high as 4500m.
The smallest chameleon species is Brookesia micra with an adult length just over 1 inch (29mm). It hatches from an egg no bigger than a grain of rice!
Chameleons have acrodont teeth meaning they are an extension of the jawbone. They are not set in sockets nor are they replaced.
Chameleons change color by rearranging a lattice of nanocrystals in one of their top layers of skin cells called iridophores. Chameleons can then stretch this layer, broadening the nanocrystalline lattice, thereby causing it to reflect a different wavelength of light.
Pygmy chameleons have bicuspid claws where each claw has two points like a crescent moon.
There are currently 202 recognized chameleon species and 85 of them are found on the island of Madagascar.
Chameleons do have taste buds on their tongue but overall they have a poor sense of taste.
Chameleons do not have external ears or a tympanic membrane, but they do have internal ears as well as degenerated middle ears. They do not hear well but they can detect low frequency sounds.
Many chameleon species have a bright red, orange or yellow mouth. This conspicuous interior when displayed is used as a defense against predators.