The Center for Biological Diversity and the Maricopa Audubon Society have sued the U.S. Fish and Wildlife Service for violating the Endangered Species Act by failing to protect habitat essential to ...

As the trail wound its way into Arizona's Sky Islands, the region's biodiversity was on full display, as were the threats ...

SAFFORD — The population of an endangered squirrel that lives atop Mount Graham south of Safford has dipped slightly in the past year. Scientists’ annual fall count of the Mount Graham red squirrel ...

The Fish and Wildlife Service has until Jan. 30, 2027, to decide on a petition to expand critical habitat filed in 2017. A federal judge says the Fish and Wildlife Service has “unreasonably delayed” ...

PHOENIX — Animal lovers now have a new piece of good news to go nuts over: a population of endangered red squirrels unique to Arizona is growing slightly. Wildlife officials found there are 233 Mount ...

TUCSON, Ariz.— A federal judge has ordered the Trump administration to make a long-overdue decision on whether to expand critical habitat for Arizona’s highly endangered Mount Graham red squirrels.

• Mount Graham is known to the Apache as Dzil Nchaa Sian. • Individual and relay runners will travel almost 200 miles in two days. • This year's event is the tribe's 19th annual. • 130 runners are ...