Once thriving, there are now believed to be just 73 Southern Resident killer whales left in Washington state's Puget Sound.

An attorney with the U.S. Department of Justice requested extra time to respond to a recent lawsuit against a trio of federal ...

Learn about the Striped Newt and the fight for its endangered species protection after recent legal developments.

A lawsuit filed on Tuesday argues the federal government knows a rare desert wetland wildflower is in trouble, but it isn’t ...

A new stretch of border wall will soon be built through the San Rafael Valley, southeast Arizona's last major open space for ...

A new bill targets a predator some Arizona ranchers say is killing their livelihood as well as their livestock.

Scientists and governments are calling for the strongest international protections yet for sharks and rays, citing ...

A new lawsuit filed against the U.S. Fish and Wildlife Service is seeking Endangered Species Act protections for a rare ...

PETA (People for the Ethical Treatment of Animals) filed a lawsuit against the Barry R. Kirshner Wildlife Foundation in the ...

U.S. Rep. Paul Gosar (R-Ariz.) introduced legislation this week to remove the Mexican gray wolf from the endangered species ...

The Center for Biological Diversity sued the U.S. Fish and Wildlife Service today seeking Endangered Species Act protections for the Tecopa bird’s beak, a rare desert wetland wildflower that grows in ...