Jess (falconry) chase something it shouldn't, and less to keep the bird from getting away, as falconry birds are routinely (and as part of the sport) set free—the bond between bird and falconer serves as a much better leash than any leather or rope ever will; however, it is not always desirable that a bird be able to take flight at its own whim, and both on the glove and on the perch, jesses help ensure this. During hunting season (small game season for North American falconers), jesses are generally worn all season in the mews, and are often removed for the
Falconry peregrine falcons flown against the red grouse, or merlins in "ringing" flights after skylarks. Rooks and crows are classic game for the larger falcons, and the magpie, making up in cunning what it lacks in flying ability, is another common target. Short-wings can be flown in both open and wooded country against a variety of bird and small mammal prey. Most hunting with large falcons requires large open tracts where the falcon is afforded opportunity to strike or seize its quarry before it reaches cover. Most of Europe practices similar styles of falconry, but with differing degrees of regulation. Medieval