Expert marine mammal researchers spotted up to 10 of the porpoises during a recent survey in the Upper Gulf of California.

BIRMINGHAM, Ala. — The Center for Biological Diversity filed a petition today with the U.S. Fish and Wildlife Service to protect the Birmingham darter under the Endangered Species Act.

An international investigation uncovers how criminal networks traffick parts of the totoaba, an endangered fish caught in ...

Bergman urges delisting of the gray wolf from endangered species list Washington – Rep. Jack Bergman and a coalition of House ...

Fish who have never known the river graduated to the wild on Wednesday, when the Albuquerque BioPark and the U.S. Fish and ...

Sean Jansen set out to walk coast, rivers and mountains where the trout species call home to raise awareness about their ...

Hundreds of tiny endangered fish slipped from orange plastic buckets into a glittering lagoon in Malibu on Tuesday, returning home five months after being whisked away from threats wrought by the ...

The U.S. Fish and Wildlife Service says it won't craft a nationwide wolf recovery plan, and that wolves no longer need ...

Best available science or best possible? Conservationists say the latter could mean doom for many species on the brink.

The Olympic marmot is endemic to the mountains of the Pacific Northwest and have faced threats from climate change and coyote ...

The U.S. Fish and Wildlife Service reported last week it will not prepare plans for recovering the gray wolf because the ...