Very accurate description of the difference between Muscovy's and other domestic ducks.Muscovies have a different body shape than other ducks. They're not even technically ducks. They sound different, different body language, they get along fine with ducks and have a lot of similarities, but they are very distinct. You won't see a tail like that on a mallard derived duck, the bill is different too. And I believe you can tell gender at that age, it's just a bit difficult and perhaps not as accurate.