There are now more Mexican gray wolves roaming the American Southwest than at any time since the federal government began reintroducing the endangered predators.
The federal government on Monday pledged $3.2 million to help save the monarch butterfly, the iconic orange-and-black butterfly that can migrate thousands of miles between the U.S. and Mexico each year. In recent years, the ...
In December, the red knot was added to the U.S. Fish and Wildlife Service's list of endangered and threatened wildlife, making it the first bird whose listing identifies climate change as a principal threat to its survival. ...
A rust-colored shorebird known for a nearly 20,000-mile migration will now receive federal protection, setting the stage for states to coordinate preservation plans for the dwindling species.
Wildlife advocates have sued the federal government after it declined to designate some areas in the West as critical habitat for the imperiled Canada lynx.
Six environmental groups have asked a judge to throw out a federal agency rule that concluded oil company exploration off Alaska's northwest coast will have a negligible effect on walrus.
An animal resembling a gray wolf has been spotted roaming the far reaches of northern Arizona, officials said Thursday, and tests are planned to determine exactly what it is.
US wildlife authorities have ordered planes to avoid flying too close to a vast herd of exhausted walruses beached on a remote Alaskan beach.
Federal wildlife officials are considering deadly measures to keep an Alaska big game animal introduced more than 50 years ago to a remote island in the Aleutians from expanding its range.
About 2,500 manatees have perished in Florida over the last four years, heightening tension between conservationists and property owners as federal officials prepare to decide whether to down-list the creature to threatened ...