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 training and technique is illegal in the UK, as is releasing a captive bred bird. In America, trapping or attempting to trap any native species of raptor is a federal crime unless the person doing the trapping is licensed. A falconry permit allows a falconer to trap certain birds at certain times of the year. A falconry bird taken from the nest as a downy bird still unable to fly (a fledgling) is called an 'eyass' (by misdivision of French "un niais" from Latin "nidiscus", from Latin "nidus" = "nest"). In addition to wild-taken eyass hawks, all captive bred hawks taken at this