Mexico makes up only one percent of the Earth���s land area, but is home to an impressive one-twelfth of all of the species known to science. A megadiverse country, Mexico is also a major center of origin and domestication of plants and a key flora and fauna dispersal corridor. Its rainforests are among the richest reservoirs of biological material on the planet, and its diverse habitats are home to a broad array of wildlife, including many seasonal residents that migrate to and from the U.S. and other areas. Despite the multiple efforts and initiatives by local authorities, international agencies, non-government organizations and donors, Mexico���s astonishing natural diversity remains threatened by habitat loss and degradation, agricultural encroachment and intensification, invasive alien species, human intrusion and disturbance, illegal wildlife trade, poaching and human-wildlife conflicts. In response to these challenges, the U.S. Fish and Wildlife Service (the Service) together with the Secretariat of Environment and Natural Resources of Mexico (SEMARNAT) established the Wildlife Without Borders ��� Mexico program, as a cooperative effort between the United States and Mexico to preserve our shared natural heritage. Program Goal: To conserve priority species, habitats and ecological processes across landscapes with high biodiversity value in Mexico. Authorizing Legislation: Endangered Species Act of 1973, as amended (16 U.S.C. 1531-43)