Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Ciconiiformes Bonaparte, 1854
                   Family Ardeidae Leach, 1820 - herons, bitterns and egrets
                     Genus Hydranassa Baird, 1858 see Genus Egretta Forster, 1817
                       1 Hydranassa rufescens (J.F. Gmelin, 1789) see Egretta rufescens (Gmelin, 1789)
                       2 Hydranassa tricolor (P.L. Statius Müller, 1776) see Egretta tricolor (Statius Müller, 1776)