Red Fox, Denali National Park, Alaska, 2001
Photograph by Joel SartoreIn Alaska's Denali National Park, a red fox opens wide for a yawn. Foxes are masters of adaptation, allowing them to thrive despite environmental pressures. They live in forests, grasslands, mountains, deserts, and even human environments such as farms and suburban areas. They are solitary hunters that feed on rodents, rabbits, birds, small game—even fish, frogs, worms, and garbage.