The canvasback is distinguished
from other ducks by its sloping profile. The male
has a rusty red head, white body, and black chest
and rear end. The female is drabber and marked in
brown and gray.
Distribution and Habitat
The canvasback breeds in
prairie potholes from Alaska to the Northwest
Territories, southward to Nevada and Minnesota.
It winters on ocean bays, lakes and rivers across
much of coastal and southern United States.
The canvasback's species name
of valisineria comes from Vallisneria
americana, the scientific name for wild
celery, the winter buds and rhizomes of which are
the duck's preferred food during the non-breeding
period. It also feeds on the seeds, leaves and
roots of other plants, as well as on snails and
genus & species Aythya valisineria
All About Birds http://www.allaboutbirds.org/guide/Canvasback/id
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