I bought 3 Welsh Harlies for my son this spring. The sign said they could be sexed by bill color, so I was sure I got 2 ducks and a drake. Now I am not so sure that their information was right. The bill on the obvious drake is DARK like the KCs, but the other two's bills are yellow with some spotting. However, the color for the one is looking drakish to me, but the bill is like the obvious duck's. Maybe they just have bad color issues, I don't know? I know little about ducks. I do know that when their tails curl into drake feathers who is who, but fair is a month away and we need to mark down who is going and who is not. Drake with dark bill: The three behind the KC: Thanks for any help.