Jess (falconry) anklet worn by the bird, which is itself formed of another rectangular strip of leather, bound together at the ends by a grommet (usually of brass), prevented from slipping through the grommet by the knobbed end. Often, another slit is placed near the thin end of the jess cut about one inch long and running lengthwise, through which a special type of swivel is fitted, preventing the whole arrangement from twisting or tangling about itself or the bird when a leash is threaded through the other end. Their intent is more to prevent the risk of the bird deciding to
Falconry niche in ancient and modern falconry. Most falcon species used in falconry are specialized predators, most adapted to capturing bird prey such as the peregrine falcon and merlin. A notable exception is the use of desert falcons such the saker falcon in ancient and modern Middle Eastern and Asian falconry, where hares were and are commonly taken. In North America, the prairie falcon and the gyrfalcon can capture small mammal prey (as well as gamebirds and waterfowl) in falconry, but this is rarely practiced. Young falconers often begin practicing the art with American kestrels, the smallest of the falcons in