Endangered Species Act (ESA) Endangered, Threatened, and Candidate Species List for Rocky Mountain National Park. The following table contains a list of species that are specific to Rocky Mountain National Park and are federally listed as endangered, threatened or candidates for listing, by the U.S. Fish and Wildlife Service under the provisions of the Endangered Species Act. The U.S. Fish and Wildlife Service has reviewed the list and provided a letter of concurrence dated January 15, 2004.