Chameleons or chamaeleons (family Chamaeleonidae) are a distinctive and highly specialized clade of lizards. The approximately 180 species of chameleon come in a range of colors, and many species have the ability to change colors. Chameleons are distinguished by their zygodactylous feet; their very long, highly modified, rapidly extrudable tongues; their swaying gait; and crests or horns on their distinctively shaped heads. Most species, the larger ones in particular, also have a prehensile tail