The Mount Graham red squirrel lives only in the Pinaleño Mountains on Mount Graham, an isolated “sky island” range in southeastern Arizona. Nearly all the squirrels are now living outside of the ...

Mount Graham red squirrels live only in the Pinaleño Mountains, an isolated “sky island” range in southeastern Arizona. Nearly all the squirrels now live outside the currently designated critical ...

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.

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.