Rouen ducks! GENDER??

[svendela]

So I got Rouen ducklings on June 1st and I was wondering if there was a way for me to sex them?

 

[Welshies]

By this time you can voice sex them, and bill sex a few.
Males have greenish bills, females have yellow bills. Like so:

Females (hens) quack: QUACK QUACK QUACK. Males have a raspier, quieter whaaap. To voice sex, you can carry each one (on at a time) away from the others to tell.

 

[svendela]

Well if I'm right per your instructions I have 7 males and just 1 female

 

[Welshies]

Well if I'm right per your instructions I have 7 males and just 1 female

You'll need to fix that ratio.

 

[svendela]

You'll need to fix that ratio.

does this look like a male and a female? If so yes it's 7 to 1