Class Aves Linnaeus, 1758 - birds
see Subclass Aves Linnaeus, 1758
Subclass Neornithes Gadow, 1893
see Clade Neornithes Gadow, 1893
Infraclass Neoaves Sibley et al., 1988
see Subcohort Neoaves Sibley et al., 1988
Parvclass Coraciae
see Order Coraciiformes Forbes, 1884
Superorder Bucerotimorphae
see Suborder Bucerotes Fürbringer, 1888
Order Bucerotiformes Fürbringer, 1888
see Infraorder Bucerotides Fürbringer, 1888
Family Bucerotidae Vigors - hornbills
Genus Aceros Hodgson, 1844
Aceros undulatus (Shaw, 1811) - wreathed hornbill
see Rhyticeros undulatus (Shaw, 1811)