The squirrels live only in the Pinaleño Mountains, an isolated “sky island” range in southeastern Arizona. Only about 78 remain on Earth. The squirrels’ current designated critical habitat includes ...

Located in Arizona's Pinaleno Mountains at an altitude of about 7,545 feet, the Large Binocular Telescope operates under an international collaboration between the U.S., Italy, and Germany.

Wildlife officials found there are 233 Mount Graham red squirrels, which can only be found in the Pinaleño Mountains of southeastern Arizona. These numbers reflect a sharp boost from the ...

The lawsuit, filed in U.S. District Court in Tucson, says the U.S. Forest Service and U.S. Fish and Wildlife Service have failed to evaluate how summer homes and an abandoned camp in the Pinaleño ...

The latest survey shows an increase of about 89 squirrels since last year, marking a positive trend for this species, which is native only to the Pinaleño Mountains in southeastern Arizona.