A lawsuit to protect the snail darter from the Tellico Dam in Tennessee offered the first real test of the 1973 Endangered ...

The two-inch snail darter became a symbol for regulatory overreach in the 1970s. New research suggests the fish was not an endangered species — or even a species.

The U.S. Fish and Wildlife Service (USFWS) will keep endangered species protections for grizzly bears in place in most of the ...

Nearly a quarter of the world's freshwater species are at risk of extinction due to a multitude of threats, according to new research.

Federal wildlife officials on Tuesday moved to add the monarch butterfly to its endangered species roster, citing decades of steep population decline of the striking black-and-orange insect.

They would become the most commonly seen species to receive federal protection if the proposal is adopted. By Catrin Einhorn Federal wildlife officials proposed on Tuesday that monarch butterflies ...