Birds that call Arizona's desert ecosystem home — including the state's iconic cactus wren — are in serious decline, according to a sweeping new conservation report. Why it matters: Birds are ...

Arizona’s desert birds are in decline, according to a national conservation report tracking long-term bird populations, prompting one conservation group to ask the federal government to take action on ...

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 ...

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 ...

Biologists treat sick and injured condors in a remote "hospital" in northern Arizona. The birds also receive vaccines to fight the avian flu. The condors ingest lead ammunition when they eat animal ...

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 ...