Gill, F., and D. Donsker, eds. 2014. IOC World Bird List (v 4.3). Available at http://www.worldbirdnames.org [Accessed 11 September, 2014]
Ссылка для:
Setophaga nigrescens
Источник:
AOU Check-List (09-2014)
Приобретенный:
2014-09-15
Примечания:
American Ornithologists' Union's "AOU Checklist of North and Middle American Birds" (AOU Check-list, 7th edition, updated through the 54th supplement), maintained at http://checklist.aou.org/