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