Rouen or Mallard

[Mgravitt87]

We bought these 3 at Tractir Supply in May. From what I’ve read the one in the middle of the second picture is the drake and the other 2 are hens. It’s since been confirmed by their sounds. They are slightly smaller than my Pekins but not by much. Rouen or Mallard?
What would be some tell tell signs to look for in the future?

 

[NuggetTheChicken]

Rouen. Mallards are pretty small and can fly. Rouens look like mallards but they are larger and heavier, unable to fly. Very pretty ducks!