Ducks, Geese, and Swans: Species accounts (Cairina to Mergus)

Alaska Anatidae Anser areas Aythya Bellrose Bewick's Swans bill birds breast breeding behaviour breeding season brood Canada Geese Canvasbacks captivity clutch coastal Common Eider Condor Conservation and threats courtship coverts Cramp and Simmons dabbling ducks dark brown darker Delacour Description ADULT diet Displays and breeding diving ducks ducklings ecology eggs Eider feathers feeding Field characters Fish fledging flight Geese Goldeneye Goose green Grey Teal habitat hatching head Iceland IMMATURE incubation Island IWRB Johnsgard 1965a Kear lakes Lesser Scaup Livezey Mallard Manage Marchant and Higgins MEASUREMENTS AND WEIGHT Merganser migration moult neck nest non-breeding North America Northern Mallard Northern Pintail numbers pairbond pairs pale Palmer Pintail plumage Pochard population Range and status Redhead River Ruddy Duck Scaup sexes Slimbridge South southern species speculum subspecies Swans Cygnus tail tarsus tion Tufted Duck underparts Univ Unpubl waterfowl Weller Wetlands International Whooper Swan Wildfowl Wildl Wildlife Wilson Bull winter Zool