Editing Collared trogon (section)

==Taxonomy and systematics==

The [[International Ornithological Committee]] (IOC) and the [[Clements taxonomy]] recognize these 10 subspecies of collared trogon. They treated ''T. c. aurantiiventris'' ("orange-bellied trogon") as a separate species until the late 2010s.<ref name=IOC11.2/><ref name=Clements>{{cite web|author=Clements, J. F.|author2= T. S. Schulenberg|author3= M. J. Iliff|author4= S. M. Billerman|author5= T. A. Fredericks|author6= J. A. Gerbracht|author7= D. Lepage|author8= B. L. Sullivan|author9= C. L. Wood|year=2021|title=The eBird/Clements checklist of Birds of the World|url= https://www.birds.cornell.edu/clementschecklist/download/ |access-date= August 25, 2021}}</ref>

*''T. c. puella'' <small>[[John Gould|Gould]] (1846)</small>
*''T. c. underwoodi'' <small>[[Outram Bangs|Bangs]] (1908)</small>
*''T. c. aurantiiventris'' <small>[[John Gould|Gould]] (1846)</small>
*''T. c. extimus'' <small>[[Ludlow Griscom|Griscom]] (1929)</small>
*''T. c. heothinus'' <small>[[Alexander Wetmore|Wetmore]] (1967)</small>
*''T. c. virginalis'' <small>[[Jean Cabanis|Cabanis]] & [[Ferdinand Heine|Heine]] (1863)</small>
*''T. c. subtropicalis'' <small>[[John T. Zimmer|Zimmer]] (1948)</small>
*''T. c. exoptatus'' <small>Cabanis & Heine (1863)</small>
*''T. c. collaris'' <small>[[Louis Pierre Vieillot|Vieillot]] (1817)</small>
*''T. c. castaneus'' <small>[[Johann Baptist von Spix|Spix]] (1824)</small>

[[BirdLife International]]'s ''[[Handbook of the Birds of the World]]'' (HBW) recognizes eight subspecies, excluding ''T. c. aurantiiventris'' and ''T. c. underwoodi''.<ref name=HBW2020>{{cite web|author=HBW |author2=BirdLife International |author2-link=BirdLife International |name-list-style=and |year=2020|title=Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world |version=Version 5 |url=http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip  |access-date= May 27, 2021}}[.xls zipped 1 MB]</ref>