Phylum Chordata Bateson, 1885 - chordates
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 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