Need help sexing my duck

[aaroninau]

I'm new to the duck world. Coukd you help me to tell uf my white duck is a hen or rooster? Sure the other two are hens. Never see white one mating with them. Thank you.

 

[Mylied]

He has a drake curl on his tail, so he's a drake (the term for male ducks). You can tell by voice too. Females have loud quacks. Males have a quieter, raspy sound.