43 cm (17") Rare. Alaskan coast. May winter to southern California. Small Mallard-shaped eider.
Male: white head with a black eye patch, green patch on back of head, black chin and throat collar that continues along back. Creamy buff underneath. A black spot on front side of bird.
Female: dark mottled brown overall.
Videos
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Credit: piebstrains1
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Credit: Shetland Wildlife
Images

Credit: Laura L. Whitehouse/USFWS

Credit: Ómar Runólfsson