Collared lizards, Helmeted lizards, and Basilisks have well developed head crests, typically in the shape of a helmet. They inhabit forested areas and range from Mexico as far south as Ecuador. Until recently, these lizards were included in the family Iguanidae. Now they have a family of their own, consisting of 3 genera and about 9 known species. These lizards are also considered a "New World" family because they are found on the continent of North America in Central America, starting in Cost Rico and Panama and Costa, southward into Columbia on the continent of South America.