Restore Protect conserve America's wildlife Resources. The Canvasback (Nyroca Valisineruia) Canvasbacks riding the waves, their white backs flashing and rusty hearts catching the sunlight are as handsome as any of the waterfowl. On the wing, heading into the wind, their long necks and long bills give them a slender look as if the wings were set for back. In recent years, drought, drainage and other agencies have reduced the numbers of Canvasbacks so alarming that it has been a matter of concern to many people. Although Canvasbacks and fond throughout a large part of the United States during migration, and along both coasts in winter, they nest principally in the interior and western parts of North America, in prairie regions from Alaska, Saskaichewan and western Manitoba South to Oregon, Nevada, Nevada, northern New Mexico and Minnesota.