An illegal sport is any sport that is illegal in one or more jurisdictions due to the violent or dangerous nature of the sport. Well-known illegal sports, such as cockfighting and dogfighting, are barred on the basis of animal abuse. Illegal sports are controversial due to the dangerous aspects attributed to them and the pain they can inflict on humans or animals. They also are controversial due to the perceived nature of some of them — notably dogfighting — as being savage sports.