what is its scientific name?
Falco peregrinus
Peregrine falcon
The peregrine falcon ("Falco peregrinus"), also known as the peregrine, and historically as the duck hawk in North America, 
why is the peregrine falcon the fastest bird Due to its characteristic hunting stoop (high-speed dive) how fast is it? UNANSWERABLE
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Peregrine falcon [SEP] Introduction
The peregrine falcon ("Falco peregrinus"), also known as the peregrine, and historically as the duck hawk in North America, is a widespread 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, reaching over during its characteristic hunting stoop (high-speed dive), making it the fastest bird in the world, as well as the fastest member of the animal kingdom. According to a "National Geographic" TV program, the highest measured speed of a peregrine falcon is . As is typical for bird-eating raptors, peregrine falcons are sexually dimorphic, with females being considerably larger than males.