Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
         Superorder Anserimorphae see Order Anseriformes Wagler, 1831
           Order Anseriformes Wagler, 1831 - waterfowl and screamers
             Infraorder Anserides see Suborder Anseres Linnaeus, 1758
               Family Anatidae Vigors, 1825 - ducks, geese, swans
                 Subfamily Oxyurinae Phillips, 1926 - stiff-tailed ducks see Subfamily Anatinae Vigors, 1825
                   Genus Oxyura Bonaparte, 1828 - blue-billed duck
                     1 Oxyura dominica (C. Linnaeus, 1766) - masked duck see Nomonyx dominicus (Linnaeus, 1766)
                     2 Oxyura jamaicensis (Gmelin, 1789) - ruddy duck
                     3 Oxyura ferruginea (Eyton, 1838) - Andean duck
                     4 Oxyura leucocephala (Scopoli, 1769) - white-headed duck
                     5 Oxyura maccoa (Eyton, 1838) - Maccoa duck
                     6 Oxyura vittata (Philippi, 1860) - lake duck
                     7 Oxyura australis Gould, 1837 - blue-billed duck