The peregrine falcon (Falco peregrinus), also known simply as the peregrine, [3] and historically as the duck hawk in North America, [4] is a cosmopolitan bird of prey (raptor) in the family Falconidae. A large, crow -sized falcon, it has a blue-grey back, barred white underparts, and a black head. The peregrine is renowned for its speed. More @Wikipedia
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