What duck?

[Turtlebird]

Hello, I'd like to know for sure what kind of duck this is.   It was at Fifty Point Conservation Area in Grimsby.  The pictures are not great but hope I can find out what it is, I am thinking white-winged scoter?
Thanks.

[amblesidebirder]

Judging on the the head shape, bill and where the white patch shows on the wing in flight, I would say it is a female White-winged Scoter.