As adults, they generally have a blue-gray back and long pointed wings, with black feathers at the base of the wings, and a long tail. The peregrine falcon is a much smaller bird than the bald eagle or osprey. It is closer in size to a crow. Its body length is 14-21 inches, its wingspan is about 40 inches, and its weight varies from 1.1 to 5.24 lbs.
Females are always larger than males.
In contrast to the bald eagle, which is found only in North America, peregrine falcons are found in every continent except Antarctica. Their streamlined body is adapted for speed. Their diet consists primarily of small-medium sized birds such as pigeons, starlings, gulls, etc., and they are generally located amongst mountain ranges, near rivers, and along coasts. Curiously, they have adapted to city surroundings and may be found in many metropolitan areas. The falcon captures prey that is in flight by diving upon it and seizing and crushing it.