The Peregrine Falcon is considered by many to be the most impressive bird of prey. It is larger than the American Kestrel and Merlin, similar in size to the Prairie Falcon, but smaller than the Gyrfalcon. The Peregrine Falcon is built for speed, with long pointed wings and a narrow tail. Adults have slate-gray upperparts and a gray ‘helmet’ that extends below their eyes. Their underparts are uniformly and thinly barred, with the exception of their white chins and throats. Juveniles appear similar to adults, but are darker and heavily streaked below, and more brown than gray above.