The reason many people don't consider them true ducks is because they are so different. They don't quack, they aren't as water-repellent, they have caruncles, they roost in trees, and males don't have the curled “sex feathers.” The meat is quite different, as well. All “true” ducks originate from the Mallard, and Muscovies do not. Some people think they're closer to geese than ducks. Whatever...it doesn't really matter. I still call them ducks, though. They act enough like a duck to be called one, whatever their technical name is. They're waterfowl, whatever the case. About half of our flock rarely dives. These eleven ducklings love water much more than the rest of the flock.