A North American diving duck with a long, sloping black bill, related (and with similar coloring) to the pochard, common in Eurasia.
- Aythya valisineria, family Anatidae
- The ponds also attract black ducks, canvasbacks, American wigeons, lesser and greater scaups, green- and blue-winged teal, cinnamon teal, and herons.
- From time to time, the pond has hosted the locally rare redhead, a member of the group to which scaup, the canvasback and ring-necked duck belong.
- Two ducks common in the winter marsh - the canvasback and greater scaup - are now up in the Yukon and the Seward Peninsula.
Late 16th century: so named because of the white back of the male.
Definition of canvasback in:
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