Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
  Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
    Count: [s] 21o;139f;2029g;9571s;2115ss; ‡1f;21g;74s;12ss
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
      Count: [s] 10o;106f;1787g;8445s;1871ss; ‡1f;18g;69s;9ss
         Superorder Strigimorphae see Superorder Falconimorphae Seebohm, 1890
        Count: [s] 2o;10f;49g;310s;91ss; ‡1g;2s
           Order Strigiformes Wagler, 1830 - owls
          Count: -
             Suborder Strigi see Order Strigiformes Wagler, 1830
            Count: [s] 2f;24g;172s;63ss; ‡1g;1s
               1 Parvorder Tytonida see Order Strigiformes Wagler, 1830
              Count: [s] 1f;2g;17s;2ss
               2 Parvorder Strigida see Order Strigiformes Wagler, 1830
              Count: [s] 1f;22g;155s;61ss; ‡1g;1s