Ini nga species ginbahin ha masunod nga subspecies:[8]
- P. a. aberti
- P. a. dumeticolus
- ↑ (1996) , database, NODC Taxonomic Code
- ↑ Gill, Frank, and Minturn Wright (2006) , Birds of the World: Recommended English Names
- ↑ (2007) , website, Gill & Wright (2006) corrigenda/updates - 21 Septyembre 2007
- ↑ Banks, R. C., R. W. McDiarmid, A. L. Gardner, and W. C. Starnes (2003) , Checklist of Vertebrates of the United States, the U.S. Territories, and Canada
- ↑ Banks, R. C., R. W. McDiarmid, and A. L. Gardner (1987) Checklist of Vertebrates of the United States, the U.S. Territories, and Canada, Resource Publication, no. 166
- ↑ (2007) , website, Zoonomen - Zoological Nomenclature Resource, 2007.09.20
- ↑ (2007) , website, AOU Check-List (07-2007)
- ↑ 8.0 8.1 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