Avialae Gauthier, 1986 see Clade Avialae Gauthier 1986
   Aves Linnaeus, 1758 see Subclass Aves Linnaeus, 1758
     Neornithes Gadow, 1893 see Subclass Neornithes Gadow, 1893
       Neognathae Pycraft, 1900
         Neoaves Sibley et al., 1988
           Natatores Baird, 1858
             Stegano-grallatores B.C. Livezey & R.L. Zusi, 2007
               Ciconiimorphae Garrod, 1874
                 1 Ciconiiformes Bonaparte, 1854
                 2 Ardeiformes Wagler, 1830