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] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
         Family Laridae Vigors, 1825 - gulls, terns and skimmers
           Subfamily Sterninae Bonaparte, 1838 - terns
             Genus Sterna Linnaeus, 1758
               Sterna nilotica Gmelin, 1789 - gull-billed tern
                 1 Sterna nilotica nilotica Gmelin, 1789
                 2 Sterna nilotica affinis Horsfield, 1821
                 3 Sterna nilotica macrotarsa Gould, 1837
                 4 Sterna nilotica aranea Wilson, 1814
                 5 Sterna nilotica vanrossemi (Bancroft, 1929)
                 6 Sterna nilotica groenvoldi (Mathews, 1912)