The American Kennel Club and the Canadian Kennel Club recognize two separate varieties of Beagle: the 13-inch for hounds less than 13 inches, and the 15-inch for those between 13 and 15 inches. The Kennel Club (UK) and FCI affiliated clubs recognize a single type, with a height of between 13 and 16 inches.
As well as making excellent (if difficult to train) pets, Beagles are used for hunting. Beagling has been referred to as "the poor person's foxhunting," as a Beagle pack (30-40 dogs) is followed on foot, not horseback. The usual quarry is the hare. Beagles are admired by some for the bloodcurdling "Beagle music" they emit when in full pursuit. Beagling, like foxhunting, is banned in England. Drag hunting is another Beagle sport.
Beagles (or their ancestors) appear to have been used for hare hunting in England as early as the reign of Edward III, who had a pack of up to 120 hare hounds with him on the battlefield during the Hundred Years' War. The first mention of the beagle in English literature by name dates from 1475. The origin of the word "beagle" is uncertain, although it has been suggested that the word derives from the French begueule (meaning "open throat") or from an Old English, French, or Welsh term meaning "small."
Beagles have superb noses and, despite their self-willed temperament, are sometimes used as sniffer dogs for drug detection. More often, though, they are the breed of choice of the United States Department of Agriculture to detect food items in luggage being transported into the U.S. The force is called the Beagle Brigade and these dogs wear a green jacket. Beagles were chosen because they are small and easy to care for, and because they are not as intimidating for people who are uncomfortable around dogs. They are also used for this purpose by the Ministry of Agriculture and Fisheries in New Zealand.