The fastest species of bird is the peregrine falcon. This extraordinary bird is famous for its incredible speed, particularly when diving to catch prey. In a stoop, the peregrine falcon can reach speeds of over 240 mph (386 km/h), making it not only the fastest bird but also the fastest animal on the planet. Its streamlined body, sharp talons, and keen eyesight are adaptations that help it hunt successfully. The peregrine falcon's remarkable aerial abilities contribute to its status as a symbol of speed and agility in the avian world.