We use the best scientific information available to determine whether to add a species to (list) or remove from (delist) the federal lists of endangered and threatened wildlife and plants. We also determine whether already listed species should be reclassified from threatened to endangered (uplist) or from endangered to threatened (downlist).

Whether you are looking for a specific document pertaining to species listing, sections of the Endangered Species Act, or anything else related to Endangered Species policy, you can find it right here in the ESA document library.

Map: U.S. Threatened and Endangered Species by County For every county in the United States, the map below shows information on all the animals and plants protected under the U.S. Endangered Species Act as threatened or endangered.

This includes recovery of threatened and endangered species and their habitats, conservation of sensitive species and their habitats, and providing for the diversity of plant and animal communities on National Forest System lands.

In the U.S., 719 animal species are listed as federally endangered or threatened. Every state is home to endangered species—some well-known, some obscure. All are vital to their...