What gender? Rouen and Khaki Campbell ducklings

[shelleyd2008]

Quote:
You should be able to tell for sure at 5 weeks old.

ETA: by the quacks that is

 

[maggiemmm]

I am definitely NOT an expert but I have noticed that most Mallard derived ducks have the curly tail feather to designate a male. Could be wrong... more people know more than I.

 

[Wifezilla]

Yes, but the curly drake feather doesn't appear for several months. The quack (or lack of quack) tells you much sooner.