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 gull and pigeon population. Falconry centres or birds of prey centres house these raptors. They are responsible for many aspects of bird of prey conservation (through keeping the birds for education and breeding). Many conduct regular flying demonstrations and educational talks, and are popular with visitors worldwide. Such centres may also provide falconry courses, hawk walks, displays and other experiences with these raptors - see links at bottom of page for details. In 2010, UNESCO inscribed falconry as a living human heritage element of eleven countries, including United Arab Emirates, Belgium, Czech Republic, France, Republic of Korea, Mongolia, Morocco, Qatar,