The squirrels live only in the Pinaleño Mountains, an isolated “sky island” range in southeastern Arizona. Only about 75 of them remain on Earth. “This finding is a step in the right direction, but ...

The Mount Graham red squirrel population in Arizona has risen more than expected, according to the Arizona Department of Game and Fish. The latest survey shows an increase of about 89 squirrels ...

TUCSON, Ariz.— Conservation groups sued the Trump administration Wednesday to force two federal agencies to comply with the Endangered Species Act and protect the imperiled Mount Graham red squirrel ...