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
Suborder Hemiprocni B.C. Livezey & R.L. Zusi, 2007
1 Family Hemiprocnidae Oberholser, 1906 - treeswifts