Defenders of Wildlife  Defenders of Wildlife are dedicated to the protection of all native wild animals and plants in their natural communities. Their programs focus on what scientists consider two of the most serious environmental threats to the planet: the accelerating rate of extinction of species with the associated loss of biological diversity, and habitat alteration and destruction.

Endangered! Exploring a World at Risk  This site from the American Museum of Natural History is from a 1997 exhibit that was at the museum.

Endangered Specie.com  You can get a list of endangered species by state on this site.

Endangered Species This page from the U.S. Fish and Wildlife Service lists officially U.S. recognized endangered species, candidates for the list, and guidelines and qualifications for the list. There's also a section of frequently asked questions.

Mammals/Rare, Threatened and endangered From Animal Info. Look for a searchable listing of endangered mammals worldwide at this site. Species are also indexed by common and scientific name, group, and country. Each entry includes a species profile, status and trends, biological and ecological data, and references. The site also includes links to related organizations, web sites, and publications.

Nature Conservancy The Nature Conservancy program is committed to preserving plant, animals and natural communities by protecting land and water resources.

Threatened Species Browse the links in the left margin. World Wildlife Fund.