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911 kilometers per hour is about two-and-a-half times as as a Peregrine Falcon.
In other words, it's 2.34 times the of a Peregrine Falcon, and the of a Peregrine Falcon is 0.427 times that amount.
(a.k.a. Peregrine, a.k.a. Duck Hawk, Falco peregrinus)
The Peregrine Falcon can reach speeds of up to 389 kph when diving. Falcons are sometimes sent to scare smaller birds away from airports to improve air traffic safety and were used in World War II to intercept carrier pigeons used by enemy forces.
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