Arizona offers some of the very best bird watching in the United States. Blame it on our remarkable diversity. Soaring mountains, warm deserts, deep canyons and rolling grasslands provide welcoming ...

The Center for Biological Diversity has asked the U.S. Fish and Wildlife Service to add the Bendire's thrasher to the endangered species list. The thrasher is a rare desert songbird whose habitat is ...

Earth’s vertebrate diversity may be far richer than anyone realized. A sweeping analysis of more than 300 studies suggests that for every known fish, bird, reptile, amphibian, or mammal species, there ...

On a cliff’s edge, overlooking the rippling waters of Lake Pleasant, biologists from the Arizona Game and Fish Department anchored ropes to nearby palo verde trees before carefully lowering themselves ...

If you have a passion for bird watching and love hummingbirds, you will have a hard time beating the beauty of Sierra Vista, known as the hummingbird capital of the United States. This beautiful ...