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
               1 Subfamily Oxyurinae Phillips, 1926 - stiff-tailed ducks see Subfamily Anatinae Vigors, 1825
               2 Subfamily Stictonettinae Boetticher, 1950
               3 Subfamily Cygninae Vigors - swans see Subfamily Anserinae Vigors, 1825
               4 Subfamily Anatinae Vigors, 1825 - pond ducks