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 Gruiformes Bonaparte, 1854
                   01 Family Rallidae Vigors, 1825 - rails, waterhens, coots
                   02 Family Mesitornithidae Wetmore, 1960 - mesites
                   03 Family Eurypygidae Selby, 1840 - sunbittern
                   04 Family Heliornithidae Gray, 1841 - finfoots
                   05 Family Rhynochetidae Newton, 1868 - kagu
                   06 Family Gruidae Vigors, 1825 - cranes
                   07 Family Aramidae Bonaparte, 1849 - limpkins
                   08 Family Psophiidae Bonaparte, 1831 - trumpeters
                   09 Family Otididae Gray, 1840 - bustards
                   10 Family Cariamidae Bonaparte, 1853 - seriemas
                   11 Family Turnicidae Gray, 1840 - buttonquails