C. L. Brehm, 1822,
North America = vicinity of Boston, Massachusetts, USA.
Recent genetic studies#R#R suggest that this species may be sister to C. caurinus, the pair being closest to C. corone and C. pectoralis. Present species and C. caurinus may well now be a single species owing to former’s genetic swamping of latter, probably accelerated by its NW range expansion (now extending N to Hyder, in Alaska), facilitated by development of formerly densely forested NW Pacific coast. No distinct boundary between nominate race and hesperis is apparent, and individuals of this species found N into SE Alaska and E to C Alberta, C Saskatchewan, Nevada, Arizona and New Mexico may include hesperis. Geographical variation largely clinal: in S USA, proposed races paulus (Alabama) and hargravei (Great Basin) synonymized with nominate. Known to hybridize in wild with C. corax. Three subspecies recognized.
Food and feeding
Status and conservation
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