maritime parts of Picardy, France.
Perhaps separable in genus Cymochorea, along with H. monorhis, H. tristrami and H. markhami#R#R. H. monorhis sometimes considered a race of present species; these two may be closest to H. homochroa. Taxonomy complex and confused, with major upheaval in recent years concerning status of birds down Pacific coast of North America; at present classification of breeders in this zone remains tentative. Situation on Guadalupe I (off NW Mexico) particularly complicated, with three distinct breeding populations, two of them now recognized specifically (H. socorroensis and H. cheimomnestes). Traditionally recognized subspecies beali (described from SE Alaska) now generally regarded as invalid. Two subspecies currently recognized.
Food and feeding
Status and conservation
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