The horns on a chameleon are made up of ringlike segments of inner bone covered by a hard keratin-like skin.
The process of shedding is called ecdysis.
Chameleons have acrodont teeth meaning they are an extension of the jawbone. They are not set in sockets nor are they replaced.
Chameleon fossils have been found in central Europe and China, indicating they were once much more widespread than they are now.
Chameleons do have taste buds on their tongue but overall they have a poor sense of taste.
Chameleons have a very poor sense of smell.
Many chameleon species have a bright red, orange or yellow mouth. This conspicuous interior when displayed is used as a defense against predators.
The largest chameleon species by weight is Calumma parsonii (Parson’s Chameleon).
Kinyongia uthmoelleri and Trioceros quadricornis gracilor have red claws.
The oldest known chameleon fossil is from the extinct species Chamaeleo caroliquarti. It was found in Europe and is 26 million years old.