Kingdom [Animalia] Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
       Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
         1 Subclass †Archaeornithes Gadow, 1893 see Superorder Archaeornithes Gadow, 1893
         2 Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893