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
Falconry fairs, has probably never been higher in the past 300 years. Ornithologist Tim Gallagher, editor of the Cornell Lab of Ornithology's "Living Bird" magazine, documented his experiences with modern falconry in a 2008 book, "Falcon Fever". Making use of the natural relationship between raptors and their prey, today, falconry is used to control pest birds and animals in urban areas, landfills, commercial buildings, and airports. Falconer Dan Frankian of Hawkeye Bird and Animal Control frequently speaks on the subject to news crews while his hawks and falcons are flying over Toronto City Hall, in an effort to control the city's