So i recently adopted 2 female ducks from an over male populated pond. My question is what are some characteristics of a rouen vs. a mallard or mallard mix? I do realize a pic would be the most helpful but i cant get one right now. So in the mean time i was hoping all you folks could educate me with pics, or info on any of these ducks or their characteristics. They are good size females, bigger than mallards, but colored like mallard hens, they have white wing tips, and a white ring around their neck, one hen also has a white patch on her belly.