They can be either black, brown, or white-and-black. However, in the Dominion of Newfoundland, before it became part of the confederation of Canada, only black and Landseer coloured dogs were considered to be proper members of the breed. They were originally bred and used as working dogs for fishermen in Newfoundland. The Newfoundlands ('Newfs' or 'Newfies') have webbed feet and a water-resistant coat. Males normally weigh 65–80 kg (143–176 lb), and females 55–65 kg (121–143 lb), placing them in the 'Giant' weight range; but some Newfoundland dogs have been known to weigh over 90 kg (200 lb) – and the largest on record weighed 120 kg (260 lb) and measured over 1.8 m (6 ft) from nose to tail, ranking it among the largest of dog breeds. But, Newfoundlands can live up to 15 years old.