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
                 01 Order Tinamiformes Huxley, 1872
                 02 Order Struthioniformes Latham, 1790
                 03 Order Podicipediformes Fürbringer, 1888
                 04 Order Gaviiformes Wetmore & Miller, 1926
                 05 Order Sphenisciformes Sharpe, 1891
                 06 Order Procellariiformes Fürbringer, 1888
                 07 Order Pelecaniformes Sharpe, 1891
                 08 Order Ciconiiformes Bonaparte, 1854
                 09 Order Phoenicopteriformes Fürbringer, 1888 see Order Ciconiiformes Bonaparte, 1854
                 10 Order Anseriformes Wagler, 1831 - waterfowl and screamers
                 11 Order Falconiformes Sharpe, 1874
                 12 Order Galliformes Temminck, 1820 - fowl
                 13 Order Gruiformes Bonaparte, 1854
                 14 Order Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
                 15 Order Columbiformes Latham, 1790 - pigeons and allies
                 16 Order Psittaciformes Wagler, 1830 - parrots
                 17 Order Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters
                 18 Order Strigiformes Wagler, 1830 - owls
                 19 Order Caprimulgiformes Ridgway, 1881 - nightjars
                 20 Order Apodiformes Peters, 1940 - swifts
                 21 Order Trochiliformes Wagler - hummingbirds see Suborder Apodi Peters, 1940
                 22 Order Trogoniformes Wetmore & Miller, 1926 - trogons
                 23 Order Coliiformes Murie, 1872 - mousebirds
                 24 Order Coraciiformes Forbes, 1884 - rollerlike birds
                 24.0 Order "Coraciformes" see Order Coraciiformes Forbes, 1884
                 25 Order Piciformes Meyer & Wolf, 1810 - scansorial birds
                 26 Order Passeriformes Linnaeus, 1758