Adults have blue-gray backs and white chests with dark barring.
Habitats and Habits Peregrine falcons feed primarily on other birds which they catch in the air, often catching their prey in spectacular dives of up to 200 mph. Since peregrine falcons are predators that feed on other birds, they occupy a position at the top of the food chain. As such, peregrine falcons are often the first to show signs of environmental problems. American peregrine falcons occur from Mexico to Alaska. In Alaska, they nest throughout the forested interior, mainly on cliffs along rivers or near lakes.