Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           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 Coraciiformes Forbes, 1884 - rollerlike birds
                   Suborder Halcyones Forbes, 1884 - kingfishers and allies
                     1 Family Alcedinidae Bonaparte, 1831 - kingfishers
                     2 Family Meropidae Vigors, 1825 - bee-eaters
                     3 Family Todidae Vigors, 1825 - todies
                     4 Family Momotidae Gray - motmots
                     5 Family Trogonidae Lesson, 1828 - trogons
                     6 Family †Archaeotrogonidae