This is a checklist of American reptiles found north from Mexico, based primarily on SSAR publications. It includes all species of the United States and Canada, including recently introduced species such as Chameleons, the Nile monitor, and the Burmese python. Subspecies are listed only in a few cases. The information about range and status of almost all of these species can be found also in the IUCN Red List of Threatened Species site. * alien species Summary of 2006 IUCN Red List categories. Conservation status – IUCN Red List of Threatened Species: and Endangered Species Act: