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 Anomalogonates Garrod, 1874
                 Subsection Incessores Baird, 1858
                   Superorder Cypselomorphae Huxley, 1867
                     Order Apodiformes Peters, 1940 - swifts
                       1 Suborder Hemiprocni B.C. Livezey & R.L. Zusi, 2007
                       2 Suborder Apodi Peters, 1940