Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           1 Order Columbiformes Latham, 1790 - pigeons and allies
           2 Order Gruiformes Bonaparte, 1854
           3 Order Ciconiiformes Bonaparte, 1854
           4 Order Passeriformes Linnaeus, 1758