The Canvas-Back in Minnesota

As a part of the migratory game bird investigations conducted under a State Pittman-Robertson Research Project, a study was made of the Canvas-back (Aythya valisineria) in Minnesota. Certain phases of the duck's life history lend themselves admirably to intensive investigation. This is particularly true during migration when the Canvas-backs concentrate in large numbers on only a few lakes in the state. Intensive studies were made of the spring and fall migrations of 1941-1943 on Lake Christina, near Ashby in Grant County, Minnesota. Other studies, carried on over a large part of the state, provided general information about the species.