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 and violent in every way." They are well known in falconry use both in Europe and North America. The northern goshawk has been trained for falconry for hundreds of years, taking a variety of birds and mammals. Other popular "Accipiter"s used in falconry include: the Cooper's hawk and sharp-shinned hawk in North America and the European sparrowhawk in Europe and Eurasia. New Zealand is likely to be one of the few countries to use a harrier species for falconry, there falconers successfully hunt with the Australasian harrier ("Circus approximans"). The genus "Falco" is found worldwide and has occupied a central