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.
The word Rhampholeon is taken from the Latinized Greek “rhamphos leon” meaning crawling lion.
The chameleon tongue accelerates towards its target at over 1642m per second. Chameleons rarely miss their intended food item.
True chameleons include the following genera: Archaius, Bradypodion, Brookesia, Calumma, Chamaeleo, Furcifer, Kinyongia, Nadzikambia, Palleon, Rhampholeon, Rieppeleon and Trioceros.
The largest chameleon species by weight is Calumma parsonii (Parson’s Chameleon).
Chameleons do have taste buds on their tongue but overall they have a poor sense of taste.
Pygmy chameleons have bicuspid claws where each claw has two points like a crescent moon.
Chameleons have acrodont teeth meaning they are an extension of the jawbone. They are not set in sockets nor are they replaced.
Some chameleons play dead to avoid predation; this is called thanatosis.