Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Caprimulgiformes Ridgway, 1881 - nightjars
         Family Caprimulgidae Vigors, 1825 - nightjars
           Subfamily Caprimulginae Vigors, 1825 - nightjars
             Genus Hydropsalis Wagler, 1832
               Hydropsalis climacocerca (Tschudi, 1844) - ladder-tailed nightjar
                 1 Hydropsalis climacocerca schomburgki Sclater, 1866
                 2 Hydropsalis climacocerca climacocerca (Tschudi, 1844)
                 3 Hydropsalis climacocerca pallidior Todd, 1937
                 4 Hydropsalis climacocerca intercedens Todd, 1937
                 5 Hydropsalis climacocerca canescens Griscom & Greenway, 1937