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] Apodiformes Peters, 1940 - swifts
         Family Trochilidae Vigors, 1825 - hummingbirds
           Subfamily Phaethornithinae Jardine, 1833 - hermits
             Genus Eutoxeres Reichenbach, 1849
               Eutoxeres aquila (Bourcier, 1847) - white-tipped sicklebill
                 1 Eutoxeres aquila salvini Gould, 1868
                 2 Eutoxeres aquila heterurus Gould, 1868
                 3 Eutoxeres aquila aquila (Bourcier, 1847)