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 Falconiformes Sharpe, 1874
                  Count: [f] 5f
                     Suborder Accipitres (C. Linnaeus, 1758) - hawks
                    Count: [f] 4f
                       Infraorder Serpentariides Seebohm, 1890
                      Count: [f] 1f
                         1 Family Sagittariidae Finsch & Hartlaub, 1870 - secretarybird
                        Count: -