The iguanas are known by their impressive exhibitions and rituals courtship and defense, in which they carry out movements raising the body and shaking the head with vigor of above to down. They live mainly in America and, outside the Western Hemisphere, only in Madagascar and Fiji Islands. They are similar to the lizards of Eurasia except by his teeth, solidly together with the inner edge of the jaw and not in the external margin of maxilar.

The iguanas can reach around 1.8 ms of length, have the squashed body and a row of flexible thorns that goes from the neck to the tail, which, releases and powerful, slightly usually it is flattened. The iguanas have eyelids, great external auditory eardrums and papadas bags or in the throat. They have five fingers in each leg, that finish in sharpened claws. On the contrary that most of the lizards, the iguanas are vegetarian. Their habitats vary; some are arborícolas, other aquatic and other terrestrial ones.

Green the common or iguana iguana is abundant in all tropical America and lives in the trees, frequently in which they grow next to the water. It presents/displays a greenish coloration or green brilliant with some dark cross-sectional bands in the tail. It has a hanging stock market in the throat, that more is developed in the males, and presents/displays a row of thorns in the dorsal part, from the head to the tail. As much the meat as eggs of this species very is appreciated like food.

The iguanas belong to the Iguánidos family (Iguanidae). The scientific name of the common iguana is iguana Iguana, the one of the iguana rhino is Cyclura cornuta and the one of the marine iguana Amblyrhynchus cristatus.