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 Gruiformes Bonaparte, 1854
           Family Otididae Gray, 1840 - bustards
             1 Genus Tetrax Forster, 1817
             2 Genus Neotis Sharpe, 1893
             3 Genus Chlamydotis Lesson, 1839
             4 Genus Ardeotis Le Maout, 1853
             5 Genus Otis Linnaeus, 1758
             6 Genus Eupodotis Lesson, 1839
             7 Genus Sypheotides Lesson, 1839