re: Anybody ever seen a white mallard hen?

The story I've told before of me and Grandad catching the entire hatch of ducklings just over the fence of the neighbors pasture when momma duck started to take them to the pond ... those were a crossbreed of mallard and some pet duck like you see at a neighborhood pond or public park. 3 or 4 of them grew up mostly white to all white, and they all had some white splotch or 2 where a purebred would not.

They all tasted just like duck over the next couple years that I know for a fact.