7 week old Rouen Ducklings

[DianeS1978]

My babys are 7 weeks one quacks the other 2 still make their peeping noise. Still not sure if male or female .. The one that quacks is getting a green head:/

 

[Hillaire]

green head = drake they all seem to find their voice at their own pace yet usually the hens tend to quack first from my experience

 

[Ducks4us]

Drakes dont quack they make a quieter froggy / raspy sound.
Only girls make the loud deep quack
So maybe thats not the one quacking?