Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Gruiformes Bonaparte, 1854
         ?Family Otidae - bustards see Family Otididae Gray, 1840
           Genus Ardeotis Le Maout, 1853
             Ardeotis arabs (Linnaeus, 1758) - Arabian bustard
               1 ‡?Ardeotis arabs lynesi (Bannerman, 1930)
               2 Ardeotis arabs stieberi (Neumann, 1907)
               3 Ardeotis arabs arabs (Linnaeus, 1758)
               4 Ardeotis arabs butleri (Bannerman, 1930)