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
           Family Caprimulgidae Vigors, 1825 - nightjars
             1 Subfamily Chordeilinae - nighthawks
             2 Subfamily Caprimulginae Vigors, 1825 - nightjars