Comprehensive resource, updating The Official World Wildlife Fund Guide to Endangered Species of North America, presents extensive data on the habitats and ecosystems of the more than 1,200 species identified as endangered or threatened by the U.S. Fish and Wildlife Service. Arranged taxonomically, entries begin with introductory information including an image of the species and a summary section. Each entry then provides detailed information on each species, including: Description, Behavior, Habitat, Distribution and Threats. Each entry concludes with a summary of recovery efforts and a bibliography of contacts for further information. Vol. 6 includes comprehensive indexes listing each species by name and geographic location, a glossary and a list of organizations.