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 Columbiformes Latham, 1790 - pigeons and allies
           Family Columbidae Illiger, 1811 - doves, pigeons
             Genus Ducula Hodgson, 1836
               Ducula aenea (Linnaeus, 1766) - green imperial-pigeon
               Ducula aurorae (Peale, 1848) - Polynesian imperial-pigeon
               Ducula badia (Raffles, 1822) - mountain imperial-pigeon
               Ducula bakeri (Kinnear, 1928) - Baker's imperial-pigeon
               Ducula basilica Bonaparte, 1854 - cinnamon-bellied imperial-pigeon
               Ducula bicolor (Scopoli, 1786) - pied imperial-pigeon
               Ducula brenchleyi (Gray, 1870) - chestnut-bellied imperial-pigeon
               Ducula carola (Bonaparte, 1854) - spotted imperial-pigeon
               Ducula chalconota (Salvadori, 1874) - shining imperial-pigeon
               Ducula cineracea (Temminck, 1835) - Timor imperial-pigeon
               Ducula concinna (Wallace, 1865) - elegant imperial-pigeon
               Ducula finschii (Ramsay, 1882) - Finsch's imperial-pigeon
               Ducula forsteni (Bonaparte, 1854) - white-bellied imperial-pigeon
               Ducula galeata (Bonaparte, 1855) - Marquesan imperial-pigeon
               Ducula goliath (Gray, 1859) - New Caledonian imperial-pigeon
               Ducula lacernulata (Temminck, 1822) - dark-backed imperial-pigeon
               Ducula latrans (Peale, 1848) - Peale's imperial-pigeon
               Ducula luctuosa (Temminck, 1825) - white imperial-pigeon see Ducula bicolor luctuosa (Temminck, 1824)
               Ducula melanochroa (Sclater, 1878) - Bismarck imperial-pigeon
               Ducula mindorensis (Whitehead, 1896) - Mindoro imperial-pigeon
               Ducula mullerii (Temminck, 1835) - collared imperial-pigeon
               Ducula myristicivora (Scopoli, 1786) - spice imperial-pigeon
               Ducula oceanica (Lesson & Garnot, 1826) - Micronesian imperial-pigeon
               Ducula pacifica (Gmelin, 1789) - Pacific imperial-pigeon
               Ducula perspicillata (Temminck, 1824) - white-eyed imperial-pigeon
               Ducula pinckeringii see Ducula pickeringii (Cassin, 1854)
               Ducula pinon (Quoy & Gaimard, 1824) - Pinon imperial-pigeon
               Ducula pistrinaria Bonaparte, 1855 - island imperial-pigeon
               Ducula poliocephala (Gray, 1844) - pink-bellied imperial-pigeon
               Ducula radiata (Quoy & Gaimard, 1830) - grey-headed imperial-pigeon
               Ducula rosacea (Temminck, 1836) - pink-headed imperial-pigeon
               Ducula rubricera (Bonaparte, 1854) - red-knobbed imperial-pigeon
               Ducula rufigaster (Quoy & Gaimard, 1830) - purple-tailed imperial-pigeon
               Ducula spilorrhoa (Gray, 1858) - Torresian imperial-pigeon see Ducula bicolor spilorrhoa (Gray, 1858)
               Ducula whartoni (Sharpe, 1887) - Christmas Island imperial-pigeon
               Ducula zoeae (Lesson, 1826) - banded imperial-pigeon