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

Over the last 30 years, efforts have been made to help improve the chances of survival for the creature. Passerby spots rare ...

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.

Panola Mountain State Park is getting a bit bigger — and experts are hoping it’ll preserve the unique environment of the park for years to come.

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 ...