Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Gruiformes Bonaparte, 1854
             Suborder Grui see Suborder Grues Bonaparte, 1854
               Infraorder Otidides
                 Family Otididae Gray, 1840 - bustards
                   1 Genus Tetrax Forster, 1817
                   2 Genus Otis Linnaeus, 1758
                   3 Genus Neotis Sharpe, 1893
                   4 Genus Ardeotis Le Maout, 1853
                   5 Genus Chlamydotis Lesson, 1839
                   6 Genus Eupodotis Lesson, 1839