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 flying horizontally. The bird that can achieve the greatest airspeed is the peregrine falcon (Falco peregrinus), able to exceed 320 km/h (200 mph) in its dives.[1][2] A close relative of the common swift, the white-throated needletail (Hirundapus caudacutus), is commonly reported as the fastest bird in level flight with a reported top speed of 169 km/h (105 mph). This record remains unconfirmed as the measurement methods have never been published or verified. The record for the fastest confirmed level flight by a bird is 111.5 km/h (69.3 mph) held by the common swift.[3]
^Sustained ground speed for approximately nine hours with no rest on high tailwinds during an Antarctic storm.
^The BBC warns against taking this value too seriously, as the methods employed to measure it have never been published, rendering its verification difficult.[citation needed]
^ abcKirschbaum, Kari; Ivory, Alicia (2002). "Aquila chrysaetos golden eagle". The Animal Diversity Web. University of Michigan Museum of Zoology. Retrieved 14 May 2013.