Chameleons can project their tongue up to 2.2 times their body length.
Kinyongia uthmoelleri and Trioceros quadricornis gracilor have red claws.
Chameleon fossils have been found in central Europe and China, indicating they were once much more widespread than they are now.
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.
The process of shedding is called ecdysis.
The horns on a chameleon are made up of ringlike segments of inner bone covered by a hard keratin-like skin.
True chameleons include the following genera: Archaius, Bradypodion, Brookesia, Calumma, Chamaeleo, Furcifer, Kinyongia, Nadzikambia, Palleon, Rhampholeon, Rieppeleon and Trioceros.
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 oldest known chameleon fossil is from the extinct species Chamaeleo caroliquarti. It was found in Europe and is 26 million years old.
The word Brookesia is named after the British naturalist Joshua Brookes.