List of birds by flight speed
This is a list of the fastest flying birds in the world. A bird's velocity is necessarily variable; a hunting bird will reach much greater speeds while diving to catch prey than when gliding. The bird with the greatest airspeed velocity is the Peregrine falcon, able to exceed 321.8 km/h (200 mph) in its hunting dives. The greatest self-powered horizontal speed is achieved by Homing Racing Pigeons. They can fly 1100 km (700 miles) in a single day, and they have been recorded flying at 177 km/h (110 miles per hour), making them the birds with the fastest speed ever recorded on a self-powered flight, and the fastest endurance flight.
Thomson's gazelle
Thomson's gazelle ("Eudorcas thomsonii") is one of the best-known gazelles. It is named after explorer Joseph Thomson and is sometimes referred to as a "tommie". It is considered by some to be a subspecies of the red-fronted gazelle and was formerly considered a member of the genus "Gazella" within the subgenus "Eudorcas", before "Eudorcas" was elevated to genus status. Thomson's gazelles can be found in numbers exceeding 550,000 in Africa and are recognized as the most common type of gazelle in East Africa. The Thomson's gazelle can reach speeds of . It is the fifth-fastest land animal, after the cheetah (its main predator), pronghorn, springbok, and wildebeest.