noun, plural can·vas·backs, (especially collectively) can·vas·back.
Origin of canvasback
Examples from the Web for canvas-back
Like most of the water-birds of America, the canvas-back is migratory.The Hunters' Feast|Mayne Reid
I do not think it adds anything to the pleasure of the canvas-back duck to take it out of such glories.Essays and Lectures|Oscar Wilde
At this point the canvas-back ducks were served, one whole shade of a bird for each guest.A House-Boat on the Styx|John Kendrick Bangs
Similar to the guttural sound made by the Canvas-back, Redhead and other diving Ducks.Color Key to North American Birds|Frank M. Chapman
A piece of canvas-back duck, at that moment in my throat, nearly choked me.Jonathan and His Continent|Max O'Rell