Big-game records keeping for both Boone and Crockett and the Pope and Young Club deals only with certain native North American big game animals. For such purposes, the southern boundary is defined as the south boundary of Mexico. Only cougar, jaguar, and whitetail deer of the recognized trophy categories range south of this boundary, and only the first two reach recordable size south of Mexico. The northern limit for trophies such as polar bear and walrus is the limit of the continent and associated waters held by the United States, Canada, or Greenland. Continental limits and held waters define east and west boundaries for all categories.
