Order Anseriformes Wagler, 1831 - waterfowl and screamers Suborder Anseres Linnaeus, 1758 - waterfowl Family Anatidae Vigors, 1825 - ducks, geese, swans Subfamily Oxyurinae Phillips, 1926 - stiff-tailed ducks see Subfamily Anatinae Vigors, 1825 1 Genus Oxyura Bonaparte, 1828 - blue-billed duck 2 Genus Biziura Stephens, 1824 - musk duck