PHOENIX – For over 25 years, the endangered Mount Graham red squirrel has been quietly battling population decline atop one of Arizona’s tallest mountains. Endemic to the Pinaleño Mountains in southern Arizona, this species of squirrel was classified as endangered in 1987, with population numbers ranging from 35 to 550. Habitat loss, wildfires and food … Continue reading Population of endangered Mount Graham red squirrels grows with help from Arizona organizations