Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Anseriformes Wagler, 1831 - waterfowl and screamers
           Family Anatidae Vigors, 1825 - ducks, geese, swans
             Subfamily Anatinae Vigors, 1825 - pond ducks
               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 leucocephala (Scopoli, 1769) - white-headed duck
                 4 Oxyura maccoa (Eyton, 1838) - Maccoa duck
                 5 Oxyura vittata (Philippi, 1860) - lake duck
                 6 Oxyura australis Gould, 1837 - blue-billed duck