Harlequin ducks

The Harlequin ducklings are now just over 3 weeks old. 2 have dark bills, one has a pinky yellow bill. Two (dark billed ones) are starting to go dark on the back. Cameron, the light billed one is huge and looks like it is going white or light. Any thoughts on sex of ducklings or is it too early?







Any clues?

That last one doesn't look like a welsh at all. My guess would be a buff or Pekin?
The Welsh have either black bills or light with a black tip, never pure orange like that one.
I can't temember right now which is which.

Yup, you were right. I wrote to the guy that I bought the eggs from and he said that he sent me half Welsh Harlequins and half Khaki Campbells and threw in a few extras for luck...hence our Pekin, Cameron?....um, he's Chinese