They are quite larger than wild Mallards. DW and I find it fun to compare the size of wild ones when we see them (yep, we're weirdos!). The size difference is very obvious once you've both as adults. Rouens were bred from Mallards though, and are pretty much their larger fatter relatives that make beautiful moving law ornaments. They are also a duel purpose breed, laying fairly well and producing and larger amount of meat.Got a silly question but how is Rouen duck different than a Mallard duck? To my untrained eye, they look about the same.
(but I agree that he's very pretty)