Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         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