Location in Oregon
Red is Summer Range - Blue is Winter range
Purple is Year-round range - Yellow is Migration range

Canvasback

Aythya valisineria - This locally abundant duck winters more in saltier waters. It mixes less with other bay ducks, although it is often found near them. Both sexes resemble the Redhead, but are noticeable lighter-backed and larger, and have a distinctly flattened head profile.