The American Kestrel is the smallest and most common falcon found in Montana.
The Peregrine Falcon may be the fastest animal in the world with diving flight speeds estimated from 100mph to 275mph. The peregrine nests primarily in the south-central and western portion of the state on cliffs over waterways. Diet consists almost entirely on birds. Dark facial mask, light breast, and lack of dark feathers in the wing pit are key field marks used to separate the Peregrine Falcon from the Prairie Falcon.
Photo shows the size difference between the largest falcon (Gyr Falcon) an the smallest falcon found in North American (American Kestrel).