Jess (falconry) chase something it shouldn't, and less to keep the bird from getting away, as falconry birds are routinely (and as part of the sport) set free—the bond between bird and falconer serves as a much better leash than any leather or rope ever will; however, it is not always desirable that a bird be able to take flight at its own whim, and both on the glove and on the perch, jesses help ensure this. During hunting season (small game season for North American falconers), jesses are generally worn all season in the mews, and are often removed for the
Jewish views of leather were led by means of straps tied to the horns (Shab. 54b). Women used to tie their hair with leather straps (ib. 57a); and by similar means shoes and sandals were fastened to the feet (Neg. xi. 11), and the tefillin to the head and arm (Men. 35b). Flagellation ("malḳut") was performed by means of three straps—one of calfskin and two of ass'skin (Mak. 22b); straps are frequently mentioned as instruments of punishment, especially of children (Yer. Giṭ. i. 43d, et passim). It would appear that straps were used to tie up certain objects, as the untying of the strap