Ini nga species ginbahin ha masunod nga subspecies:[6]
- T. c. delalandii
- T. c. salvadorii
- T. c. gibberifrons
- T. c. sharpei
- T. c. uellensis
- T. c. wakefieldii
- T. c. granti
- T. c. nudirostris
- T. c. calvus
- T. c. virescens
- T. c. vylderi
- T. c. ansorgei
- T. c. brevicera
- T. c. poensis
- T. c. schalowi
- 1 2
"Treron calvus". IUCN Red List of Threatened Species. Version 2012.2. International Union for Conservation of Nature. 2012. Ginkuhà 24 Oktubre 2012.
- ↑ (1998) , website, Zoonomen - Zoological Nomenclature Resource
- ↑ Dickinson, Edward C., ed. (2003) , The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition
- ↑ Gill, Frank, and Minturn Wright (2006) , Birds of the World: Recommended English Names
- ↑ (2005) , website, Zoonomen - Zoological Nomenclature Resource, 2005.05.08
- 1 2 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ ITIS: The Integrated Taxonomic Information System. Orrell T. (custodian), 26 Abril 2011
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