The fastest bird known is the peregrine falcon. This remarkable bird of prey can reach speeds exceeding 240 miles per hour (386 kilometers per hour) during its hunting stoop, or high-speed dive, to catch its prey. The peregrine falcon's incredible speed is achieved through its aerodynamic body shape and powerful muscles. They are found worldwide, except in extreme polar regions and some isolated islands, and primarily feed on other birds. In addition to their speed, peregrines are also known for their keen eyesight, allowing them to spot potential prey from significant distances during flight.