Chameleon, common name of certain lizards, known by its capacity to change of color when they feel threatened and in environmental answer to changes of temperature, light, color and other alterations. This change is due to the hormone action that affects to pigmentarias cells special presents in the skin. However, the chameleons not always change of color to adapt to the one of the means that surround them, as usually it is believed.

The chameleon remarkably has a language releases and sticky that projects towards the outside to hunt insects. Its body has a habitual form little and the majority specially is adapted to the arborícola life. Their long and thin legs separate them of the ground, and their fingers are divided in two groups of two and three fingers that allow him to take hold the branches, instead of clinging to them with the claws. Also its tail, releases and curved, he is prensil. Many chameleons have the great head and vaulted and the males they can exhibit up to three horns, that sometimes use in combat; a showy species of three horns is the African chameleon of Jackson.

The chameleon has a short neck and of limited mobility; however, their eyes are great and can move in many directions of independent form. It lacks external auditory eardrums, or timpánica membrane. Its length oscillates of few up to 63 centimeters. In the Iberian Peninsula the common chameleon only lives, whose distribution also extends to North Africa and some islands of the Mediterranean. It is a arborícolas species of greenish color and habits that can change of color according to the state in which it is. In Spain it is a species in extinction danger, whose populations, in the south of the Peninsula, are in frank regression.

They exist more than 100 species of true chameleons. Madagascar and other zones of Africa live in, in the Arab south of Europe, countries, India, Sri Lanka and the Seychelles islands.