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Rondonia emerald : ウィキペディア英語版
Versicoloured emerald

The versicoloured emerald (''Amazilia versicolor''), sometimes placed in the genus ''Agyrtria'', is a species of hummingbird from central and eastern South America.
== Taxonomy ==
The taxonomy is very complex and remains a matter of dispute. The nominate subspecies (''A. v. versicolor'') occurs in two main morphs; a white-throated coastal type and a green/turquoise-throated inland type.〔Weller, A. A. (1999). Versicolored Emerald (''Aryrtria versicolor''). Pp. 597 in: del Hoyo, J., Elliott, A. & Sargatal, J. eds (1999). ''Handbook of the Birds of the World.'' Vol. 5. Bar-owls to Hummingbirds. Lyxn Edicions, Barcelona. ISBN 84-87334-25-3〕 At some localities individuals with intermediate features are commonly seen, but at others the two morphs seemingly co-occur without signs of intergradation. The coastal morph was formerly known as ''A. brevirostris'', but a review lead to this name being considered to belong to the white-chested emerald of northern South America.〔 Recently, it has been suggested that the coastal type should remain as ''A. brevirostris'',〔Chebez, J. C., R. Castillo, R. Güller, & L. Castillo. (2008). ''Sobre la situación taxonómica de Amazilia brevirostris (Lesson, 1829) y su presencia en la Argentina.'' Las Ciencias 1: 67-81.〕 but this has been disputed,〔Weller, A. A., & K. L. Schuchmann (2009). ''Re-evaluation of Agyrtria brevirostris Lesson (Aves, Trochilidae), with notes on its taxonomic status and relationships to A. chionopectus Gould and A. versicolor Vieillot.'' Zoosystematics and Evolution. 85(1): 143-149〕 and has yet to gain wide recognition.
The exact distribution limits between several subspecies of the versicoloured emerald are poorly known, and, in addition to the coastal nominate, some other subspecies have been considered separate species, especially the blue-green emerald (''A. (v.) rondoniae''), also known as the Rondonia emerald.〔Gill, F., & M. Wright (2008). ''(IOC World Bird Names ).'' Version 1.6.〕 This was based on plumage and reported sympatry with ''A. versicolor'' (ssp?), but except for the blue to the head, ''A. v. rondoniae'' is very similar to ''A. v. nitidifrons'', and any evidence for sympatry is lacking. It was therefore "de-listed" by the South American Classification Committee, and is now considered a subspecies of the versicolored emerald, with some even suggesting that ''rondoniae'' is entirely invalid.〔South American Classification Committee (2005): ''(Treat Amazilia rondoniae as a subspecies of Amazilia versicolor. )''〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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