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 Gruiformes Bonaparte, 1854
           01 Family Mesitornithidae Wetmore, 1960 - mesites
           02 Family Turnicidae Gray, 1840 - buttonquails
           03 Family Pedionomidae Gadow, 1893 - plains wanderer
           04 Family Gruidae Vigors, 1825 - cranes
           05 Family Aramidae Bonaparte, 1849 - limpkins
           06 Family Psophiidae Bonaparte, 1831 - trumpeters
           06.0 Family "Psophidae" see Family Psophiidae Bonaparte, 1831
           07 Family Rallidae Vigors, 1825 - rails, waterhens, coots
           08 Family Heliornithidae Gray, 1841 - finfoots
           09 Family Rhynochetidae Newton, 1868 - kagu
           10 Family Eurypygidae Selby, 1840 - sunbittern
           11 Family Cariamidae Bonaparte, 1853 - seriemas
           12 Family Otididae Gray, 1840 - bustards
           12.0 Family Otidae - bustards see Family Otididae Gray, 1840