so my family got two rouen ducklings on April 11 and we're trying to decide what gender they are. I know what color their bills should be as adults so I think maybe we have a pair but I'm not sure. here's pics of them showing their bills. this one is our sweet little snuggle duck. there's def some yellow on his bill so I think he's a boy. this one is sociable but more independent. my eyes may have been tricking me, but I think in the sunlight today I saw some definite orange on their bill so maybe a girl?