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The American black duck (Anas rubripes) is a large dabbling duck in the family Anatidae.It was described by William Brewster in 1902. It is the heaviest species in the genus Anas, weighing 720–1,640 g (1.59–3.62 lb) on average and measuring 54–59 cm (21–23 in) in length with an 88–95 cm (35–37 in) wingspan.
Palmate feet – Chilean flamingo. Totipalmate feet – blue-footed booby. Western grebe presenting a lobate foot. Lobate feet – a chick of the Eurasian coot. The great crested grebe. The feet in loons [2] and grebes [2] [7] are placed far at the rear of the body - a powerful accommodation to swimming underwater, [7] but a handicap for walking.
Both sexes have pink or red wattles around the bill, those of the male being larger and more brightly colored. [3] [4] Although the Muscovy duck is a tropical bird, it adapts well to cooler climates, thriving in weather as cold as −12 °C (10 °F) and able to survive even colder conditions.
Its legs and bill are also black. [33] As it nears a month in age, the duckling's plumage starts becoming drab, looking more like the female, though more streaked, and its legs lose their dark grey colouring. An American black duck (upper left) and a male mallard (lower right) in eclipse plumage
The feet and legs are orange to yellow-orange. The bill is olive green in the male and dull orange with dark markings in the female. The adult male has a darker head and neck. The female is generally lighter-colored than the male and has plain back feathers. A first-year male Hawaiian duck looks like an eclipse-plumaged male mallard.
The redhead is a pochard, a diving duck specially adapted to foraging underwater. Their legs are placed further back on the body, which makes walking on land difficult. The webbing on their feet is larger than dabbling ducks and their bills are broader to facilitate underwater foraging.
American black duck Bufflehead. Order: Anseriformes Family: Anatidae The family Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans.These birds are adapted to an aquatic existence with webbed feet, bills which are flattened to a greater or lesser extent, and feathers that are excellent at shedding water due to special oils.
The Cayuga is a medium to heavy duck; standard weights are 3.6 kg (8 lb) for adult drakes and 3.2 kg (7 lb) for ducks. [11]: 440 [12]: 412 The plumage is black with iridescent beetle-green lights; particularly in ducks, some feathers may fade or whiten as the bird ages, which can be a disqualifying fault for showing.