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 Galliformes Temminck, 1820 - fowl
           1 Family Megapodiidae Lesson, 1831 - megapodes
           2 Family Cracidae Vigors, 1825 - chachalacas, curassows, guans
           3 Family Meleagrididae Gray, 1840 - turkeys
           4 Family Tetraonidae Vigors, 1825
           5 Family Phasianidae Vigors, 1825 - turkeys, grouse, pheasants, partridges
           6 Family Numididae Reichenbach, 1850 - guineafowl see Subfamily Numidinae Reichenbach, 1850