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1“... Walker, 1859. Diagnosis. Colouration metallic blue, purple to green, wing without maculae (except...”
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2“... Walker, 1859. Diagnosis. Colouration metallic blue, purple to green, wing without maculae (except...”
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3by Johnsgard, Paul A.“..., gadwall, green-winged teal, mallard, pintail, shoveler, greater scaup, common eider, king eider, harlequin...”
Published 2010
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