Setophaga nigrescens nigrescens (J. K. Townsend, 1837)
IOC World Bird List (v 4.3), website (version 4.3)
Gill, F., and D. Donsker, eds. 2014. IOC World Bird List (v 4.3). Available at http://www.worldbirdnames.org [Accessed 11 September, 2014]
Journal/Book Name, Vol. No.:
Continental US, Native
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