Sexting ducklings by bill color?

[cnaudiffred]

Sexting duckling by bill color? can this be done? and if so Any explanation or links will help me and a few others.
I have read that this is possible...
thanks

 

[HollyDuckFarmer]

MallArd derived drakes typically have green bills. Sometimes mixed girls do tho too.

 

[subhanalah]

Welsh harlequin are set linked, you can also buy the Golden 300 eggs from Metzers to hatch and they will come out see linked.

 

[learycow]

Welsh Harlequins are about 90% accurate to sex by bill color from day 1 to day 4. Then they change and it gets harder to tell. Females will have light bills, males will have dark bills. Then it swaps as adults

And as subhanalah mentioned, the golden 300s (hybrid ducks) can be sexed by color when they hatch. Males are shades of black and females are shades of brown

But all other breeds of duck can only be sexed by venting as ducklings as males and females look the same

 

[cnaudiffred]

Mine are mallard and black swede mixed, the 2 eggs that perished, ducklings were black with white chest and dark bills

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[cnaudiffred]

And also thanks for the responses

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