Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Caprimulgiformes Ridgway, 1881 - nightjars
                   1 Family Steatornithidae Gray, 1846 - oilbird
                   2 Family Podargidae Gray, 1840 - frogmouths
                   3 Family Nyctibiidae Chenu & Des Murs, 1851 - potoos
                   4 Family Aegothelidae Bonaparte, 1853 - owlet-nightjars
                   5 Family Caprimulgidae Vigors, 1825 - nightjars