Peregrines have now been reintroduced in parts of their former range and are seen year-round. Most eastern sightings, however, are of migrating tundrius birds, usually along the coast in fall. The Peregrine is recognized as a falcon by its pointed wings, narrow tail and quick wingbeats, which are not unlike a pigeons. Its size is near that of a Crow. These and its heavy mustache indentify it.
Young birds are dark brown above, heavily striped below.
The nest is found in a scrape on a ledge high on a cliff or building ledge or in an abandoned bird's nest. The 2-4 cream or buff eggs are spotted with reddish brown. In the Northern Hemisphere these are usually laid in mid-April. There is one brood. Both sexes take turns incubating for 28 to 32 days.