I know the 'sex my duck' threads are plenty but have to know! I currently have 4 mallard ducks that are about 8 weeks old. Two of them are obviously male and have a nice green sheen to their pretty little heads. The other 2 I am not so sure about. They all seem to 'quack' and all the you tube videos on the world haven't helped in the slightest. I swear I see green sometimes on their heads and then it disappears and I think I'm crazy What do you think? These are the 2 in question. The duck with the orange bill is the loudest. I love my babies but I know I'll have to rehome a few males if I do have 3 Thanks in advance!