J. K. Townsend, 1839,
Columbia River = Fort Vancouver, Clarke County, Washington, USA.
Forms a species pair with G. philadelphia; their ranges overlap in W Canada (Peace Region of British Columbia). Claimed hybrids from this zone have been considered variants of G. philadelphia with white eye-crescents (such variants occur throughout that species’ range), but recent analysis combining molecular and morphological data sets confirms numerous hybrid individuals with mixed characters, including 18 of 50 birds genotyped (36%) showing both western and eastern alleles#R. Proposed races austinsmithi (described from near Chico, in Montana) and intermedia (described from Okanagan, in S British Columbia) synonymized with monticola. Two subspecies recognized.
Food and feeding
Status and conservation
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