True chameleons include the following genera: Archaius, Bradypodion, Brookesia, Calumma, Chamaeleo, Furcifer, Kinyongia, Nadzikambia, Palleon, Rhampholeon, Rieppeleon and Trioceros.
Pygmy chameleons are sometimes referred to as False Chameleons. This term is actually incorrect and is in reference to anoles, particularly the Cuban False Anole.
Chameleons can project their tongue up to 2.2 times their body length.
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.
Chameleon fossils have been found in central Europe and China, indicating they were once much more widespread than they are now.
Trioceros goetzei (Goetze’s Chameleon) emits an audible, high pitched whistle when threatened.
Some chameleons play dead to avoid predation; this is called thanatosis.
Kinyongia uthmoelleri and Trioceros quadricornis gracilor have red claws.
The word Brookesia is named after the British naturalist Joshua Brookes.
The word Rieppeleon is named after the scientist Olivier Rieppel.