Peregrine falcons can reach speeds of 200 m.p.h. They can spot prey from a mile away. They inspired the design of the B-2 stealth bomber. They were once almost used, by the U.S. military, as a weapon.

With striking white-and-gray plumage, yellow beaks and talons, and powerfully compact bodies, peregrine falcons (Falco peregrinus) are beautiful birds in any posture. But they’re downright magical in ...