Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Columbiformes Latham, 1790 - pigeons and allies
                   Family Columbidae Illiger, 1811 - doves, pigeons
                     Subfamily Treroninae
                       Genus Ducula Hodgson, 1836
                         1 Ducula aenea (Linnaeus, 1766) - green imperial-pigeon
                         2 Ducula bicolor (Scopoli, 1786) - pied imperial-pigeon
                         3 Ducula luctuosa (Temminck, 1825) - white imperial-pigeon see Ducula bicolor luctuosa (Temminck, 1824)
                         4 Ducula concinna (Wallace, 1865) - elegant imperial-pigeon
                         5 Ducula goliath (Gray, 1859) - New Caledonian imperial-pigeon
                         6 Ducula mindorensis (Whitehead, 1896) - Mindoro imperial-pigeon