Head
They have a casque, a helmet-like ridge, on top of their heads, which is a tiny swelling as a hatchling, but grows to two inches (5 cm) in height as the animal matures.

Eyes
Their eyes can move independently and look in two directions at once, and swivel nearly 180 degrees, which makes them able to look in any direction without turning their heads. When a prey is spotted, both eyes will focus on the insect in order to perceive depth.

Tongue
Chameleons are probably best known for their long, sticky tongues that they use to catch prey. The tongue can be more than 1.5 times the length of their body. They "shoot" their prey with a tongue that can be projected in the blink of an eye.

Hands and Tail
Chameleons are highly arboreal (tree-living). They have grasping hands that work much like human hands. Three fingers are fused together and face toward the inside. They also have a prehensile tail that they use as a fifth appendage.