More than 160 species of Chameleons are known, arranged in nine genera. The main distribution of Chameleons is in Africa and Madagascar, and other tropical regions, although some species are also found in parts of southern Europe and Asia. There are introduced, feral populations of veiled and Jackson's chameleons in Hawaii and isolated pockets of feral Jackson's chameleons have been reported in California and Florida. Chameleons inhabit all kinds of tropical and montane rain forests, savannas and sometimes semi-deserts and steppes. They are mostly arboreal and are often found in trees or occasionally on smaller bushes. Some smaller species live on the ground under foliage.