Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Anseriformes Wagler, 1831 - waterfowl and screamers
         Family Anatidae Vigors, 1825 - ducks, geese, swans
           Subfamily Tadorninae Reichenbach - sheldrakes
             Genus Chloephaga Eyton, 1838
               1 Chloephaga melanoptera (Eyton, 1838) - Andean goose
               2 Chloephaga picta (Gmelin, 1789) - upland goose
               3 Chloephaga hybrida (Molina, 1782) - kelp goose
               4 Chloephaga poliocephala Sclater, 1857 - ashy-headed goose
               5 Chloephaga rubidiceps Sclater, 1861 - ruddy-headed goose