Bulldog is the name for a breed of dog commonly referred to as the English Bulldog. Other Bulldog breeds include the American Bulldog, Olde English Bulldogge and the French Bulldog. The Bulldog is a muscular heavy dog with a wrinkled face and a distinctive pushed-in nose. The American Kennel Club (AKC), The Kennel Club (UK) and the United Kennel Club (UKC) oversee breeding standards. The Bulldog is a breed with characteristically wide head and shoulders along with a pronounced mandibular prognathism. There are generally thick folds of skin on a Bulldog's brow; round, black, wide-set eyes; a short muzzle with characteristic folds called "rope" above the nose; hanging skin under the neck; drooping lips and pointed teeth and occasionally, an underbite. The coat is short, flat and sleek, with colors of red, fawn, white, brindle (mixed colors, often in waves or irregular stripes), and piebald. Example of 4 year old English Bulldog of champion bloodline, side view. Notice the "rope" over the nose, and pronounced underbite. In the US, a typical mature male weighs approximately 45–55 pounds. Mature females weigh in at approximately 45 pounds. In the United Kingdom, the breed standards are 50 pounds for a male and 40 pounds for a female. Bulldogs are one of the few breeds whose tail is naturally short and either straight or screed and thus is not cut or docked as with some other breeds.