a globally distributed falcon, Falco peregrinus, much used in falconry because of its swift flight: several subspecies are endangered.
Origin
1350-1400;Middle English
Examples from the web for peregrine falcon
For its size, it is the fastest flight of any bird, faster even than the legendary peregrine falcon.
If a peregrine falcon decides to have you for lunch, you'd better run.
The peregrine falcon is a sleek, rapid-flying bird of prey.
Success can be seen with species such as the peregrine falcon, now delisted.
British Dictionary definitions for peregrine falcon
peregrine falcon
noun
1.
a falcon, Falco peregrinus, occurring in most parts of the world, having a dark plumage on the back and wings and lighter underparts See also duck hawk