Jess (falconry) the bird, but the width is proportional to leg-length. Traditional jesses are made from a single length of leather, and slits are placed strategically along the jess to allow it to be looped through itself and around the ankle of the bird so that it fits comfortably but securely about and just above what would be the bird's ankle. With Aylmeri jesses, as created by Major Guy Aylmeri, the end of the jess is instead looped through itself repeatedly to form a "button", or knob at one end. The thin, pliable end of the jess is then threaded through an
Tether Tether A tether is a cord, fixture, or flexible attachment that anchors something movable to a reference point which may be fixed or moving. There are a number of applications for tethers: balloons, kites, tethered wind-energy conversion systems, anchors, tethered water-flow energy conversion systems, towing, animal constraint, spaceflight, and power-kiting. Tethering is also used to prevent the theft of a computer at a school or library. Tethers may break by various means; if a tether is a signal, then interruption by signal barriers breaks the tether. If the tether is a cord or rope, then upon reaching the breaking strength