San Diego, California.
Often lumped with G. arctica, but now proven to breed sympatrically (hence no scoring); differs in slightly smaller size, more rounded head, thinner bill, purple-glossed throat patch, narrower white stripes on neck sides, and paler crown (all in summer), and is darker above with narrow “choker” in winter, and (usually) no white flank patch in all seasons#R. Mixed pairings (and possible hybrids) with G. immer reported#R. Monotypic.
Extreme N & NW Nearctic and NE Siberia (E from R Kolyma)#R; winters on Pacific coast of N America S to NW Mexico and in coastal NE Asia down to S Japan.
Food and feeding
Status and conservation
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