These are 4 ducks we got from jkcove They are very friendly and we adore them. Just wondering if they are boys or girls and how we tell? They are all 4 call ducks. These are about 12weeks old I think. We were thinking both girls. Now I'm not so sure. The one with the greyback hardly makes any noise while the other one quacks really loud when we have food. These two are about 6 weeks old I think. They are still getting there feathers and it may be to early to tell. Just eager to name them. One has a much darker head and lighter bill then the other one. One (Not sure which one) will quack real loud every once in a while. (won't do it when we are looking!