Endangered Species

Tribal biologists in northern California say two critically endangered California condors could be tending an egg which would produce the region’s first fledgling in more than 100 years.

Arizona wildlife managers say consistent growth in the Mexican gray wolf population could trigger the species' downlisting under the Endangered Species Act.

A US House committee has approved a measure that would delist the endangered Mexican gray wolf. But critics worry it would doom the species.

Some things can only be found if you know exactly where to look. The Peebles Navajo Cactus, at less than 3 centimeters tall, doesn’t seem to want to be found. Its thorny spines mimic surrounding grit so closely, it nearly disappears into the sand.

Republicans in the U.S. House introduced a bill to remove the Mexican gray wolf from the endangered species list.

A childhood story about the disappearance of a Costa Rican toad sent Trevor Ritland on a quest. The Flagstaff writer and documentary filmmaker tells the story in his new book, out today.

Federal agencies have finished digging out a side channel below Glen Canyon Dam that's been a breeding ground for nonnative fish.

National Park Service officials are working to eliminate a spawning ground for harmful nonnative fish in Glen Canyon.

The Southwestern population of endangered wild Mexican gray wolves has grown for the ninth consecutive year to at least 286.

State and federal officials say recent surveys show there are double the number of endangered Mount Graham red squirrels than anticipated.