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 Trochilinae Jardine, 1833 - typical hummingbirds
             Genus Atthis Reichenbach, 1854
               1 Atthis heloisa (Lesson & DeLattre, 1839) - bumblebee hummingbird
               2 Atthis ellioti Ridgway, 1878 - wine-throated hummingbird