Trioceros goetzei (Goetze’s Chameleon) emits an audible, high pitched whistle when threatened.
Pygmy chameleons have bicuspid claws where each claw has two points like a crescent moon.
True chameleons include the following genera: Archaius, Bradypodion, Brookesia, Calumma, Chamaeleo, Furcifer, Kinyongia, Nadzikambia, Palleon, Rhampholeon, Rieppeleon and Trioceros.
Trioceros schubotzi can be found at elevations as high as 4500m.
Chameleons do have taste buds on their tongue but overall they have a poor sense of taste.
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.
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.
The largest chameleon species by weight is Calumma parsonii (Parson’s Chameleon).
Chameleons have a high midichlorian count.
Chameleons can project their tongue up to 2.2 times their body length.