Subclass Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
   Infraclass Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
     Parvclass Neornithes Gadow, 1893 see Subclass Neornithes Gadow, 1893
       Cohort Neognathae Pycraft, 1900
         Subcohort Neoaves Sibley et al., 1988
           Division Terrestrornithes B.C. Livezey & R.L. Zusi, 2007
             Subdivision Dendrornithes Verheyen, 1961
               Section Raptores Baird, 1858
                 Superorder Falconimorphae Seebohm, 1890
                   Order Falconiformes Sharpe, 1874
                     Suborder Accipitres (C. Linnaeus, 1758) - hawks
                       Infraorder Serpentariides Seebohm, 1890
                         1 Family Sagittariidae Finsch & Hartlaub, 1870 - secretarybird