Canvasback	(Aythya valisineria)
Photographed in California by Jim Rosso	Greater Scaup on the upper left and a female on the upper right. A male is sleeping in the bottom left shot.
	Anseriformes	Natural History Notes

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Other members of the genus Aythya: Greater Scaup Lesser Scaup Ring-necked Duck Redhead Tufted Duck