The horns are made of a material much like your fingernails. The males are extremely territorial and use their horns to joust with other males. The females have a much smaller nose horn or no horns at all. Only a few other chameleons bear horns. Almost all chameleons have the helmet-like casque on the head, flattened body with arched back, toes in opposing pairs for grasping twigs and a prehensile tail.
Chameleons are most famous for their ability to change colors.
Chameleons cannot change color to match their surroundings. Chameleons change their color as a response to temperature, or to communicate with other chameleons. Chameleons that are defending territory or excited by a mate can change into the most spectacular colors. The chameleon has a Y-try long tongue. The chameleon can extend its tongue as far as one and a half times its body length and can zap its prey with speed and accuracy.