Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Status: extant
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
  Status: extant
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
    Status: extant
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
      Status: extant
         1 Superorder Cuculimorphae Sibley et al., 1988
        Status: extant
         2 Superorder Psittacimorphae Huxley, 1867
        Status: extant
         3 Superorder Apodimorphae see Order Apodiformes Peters, 1940
        Status: extant
         4 Superorder Strigimorphae see Superorder Falconimorphae Seebohm, 1890
        Status: extant
         5 Superorder Passerimorphae Sibley et al., 1988
        Status: extant