Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
Count: [o] 31o;113f; ‡2o;6f; †11o;14f
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
  Count: [o] 31o;113f; ‡2o;6f; †11o;14f
     Parvclass Neornithes Gadow, 1893 see Subclass Neornithes Gadow, 1893
    Count: [o] 31o;113f; ‡2o;6f; †4o;7f
       Cohort Neognathae Pycraft, 1900
      Count: [o] 27o;107f; ‡3f; †4o;7f
         Subcohort Neoaves Sibley et al., 1988
        Count: [o] 25o;99f; ‡2f; †2o;4f
           Division Terrestrornithes B.C. Livezey & R.L. Zusi, 2007
          Count: [o] 17o;78f; ‡2f; †1o;3f
             Subdivision Dendrornithes Verheyen, 1961
            Count: [o] 13o;50f; ‡1f; †1o;1f
               Section Raptores Baird, 1858
              Count: [f] 2o;7f
                 Superorder Falconimorphae Seebohm, 1890
                Count: [f] 2o;7f
                   Order Strigiformes Wagler, 1830 - owls
                  Count: [f] 2f
                     1 Family Tytonidae Mathews, 1912 - barn owls
                    Count: -
                     2 Family Strigidae Vigors, 1825 - owls
                    Count: -