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 training and technique typically associated with humans, such as other pets, houses, or automobiles. The better manned a falconry bird is, the more calm and less likely it will be to engage in a fight or flight response around people. A wild bird in juvenile plumage is called a passager, meaning it is under a year old. When a wild bird is used in falconry, passage birds are preferred. Since many of these birds would otherwise die (estimates run from 30-70 percent) within their first year, the taking of juvenile hawks by falconers has no noticeable effect on raptor populations. Baited traps used