We don't see any Canvasbacks until it gets real cold and then there is only a few weeks left in the season. Last year was great we had our limits by 8AM (1 per person) each morning on Canvasbacks and actually one day we had 2 flocks set in the decoys of 50 to 60 in each group. I got some great pictures. I love how all those birds buzz the decoys at 60 MPH 5 or6 times checking things out! Pretty awsome.