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] Ciconiiformes Bonaparte, 1854
         Family Threskiornithidae Richmond, 1917 - ibises and spoonbills
           Subfamily Threskiornithinae Richmond, 1917 see Family Threskiornithidae Richmond, 1917
             Genus Theristicus Wagler, 1832
               1 Theristicus caerulescens (Vieillot, 1817) - plumbeous ibis
               2 Theristicus caudatus (Boddaert, 1783) - buff-necked ibis
               3 Theristicus melanopis (Gmelin, 1789) - black-faced ibis