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 ...

Did you know that Arizona is the hummingbird capital of the United States? With over a dozen species found in the state, including the Anna's hummingbird, the Costa's hummingbird and the broad-billed ...

Arizona’s third-hottest summer on record is proving fatal for even the most resilient desert species, as saguaros and ...

Two environmental groups have filed a lawsuit against the federal Bureau of Land Management and the U.S. Fish and Wildlife Service for allegedly failing to protect the habitat of two endangered ...

Enjoy the elegant trogon, a longtime summer visitor to Southern Arizona that now is increasingly staying for the winter. But don't get too attached to the purple finch, because that mountain bird's ...

Staff from the Center for Biological Diversity documented Monday that construction has begun on a new segment of border wall ...