Chameleons, of the family Chamaeleonidae are a distinctive and highly specialized type of lizards. They are recognized by their parrot-like feet, their separately mobile and stereoscopic eyes, their very long tongues, their swaying gait, crests or horns on their distinctively shaped heads, and the ability of some to change color. There are approx. 160 different species of chameleons. Chameleons have very long tongues. The tongue extends out faster than human eyes can follow, at around 26 body lengths per second. The tongue hits the prey in about 30 thousandths of a second.