ok, i looked up on the internet how to tell the sex of a duck, it said that if they have a curled feather on theyre tush, then its a male. i have three ducks, 2 of them have the curled feather and the other one doesnt. the one that doesnt is the biggest duck and its always getting on top of the other ducks trying to be "romantic". so i wonder if hes the boy? Im not sure!! someone help? does that duck not know the other two are boys, is that duck a girl?