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 Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
           Suborder Lari Sharpe, 1891 - gulls and allies
             Family Sternidae Bonaparte, 1838 see Subfamily Sterninae Bonaparte, 1838
               Genus Chlidonias Rafinesque, 1822
                 Chlidonias hybrida (Pallas, 1811)
                 Chlidonias leucoptera see Chlidonias leucopterus (Temminck, 1815)
                 Chlidonias nigra (C. Linnaeus, 1758) see Chlidonias niger (Linnaeus, 1758)