Peregrine falcons have been called nature’s finest flying machines. They have been clocked diving or swooping at speeds of up to 130 miles per hour! Peregrine falcons feed primarily on birds they take in the air. Their prey includes ducks, pheasants, and pigeons. Females lay two to four eggs in a scrape on cliff ledges or on the ground. Many falcons make their homes in working quarries despite the risk of the disturbance of quarrying activities.