Do Call Duck drakes get a curly tail feather

[my spoiled chickens]

I have 5 call ducks and there is one (white) that I think is a boy because their quack is a little raspier but not super raspy.
All the others have either sex-linked colors or a female "quack" they are 4 months old

 

[muddy75]

Yes, your drake should get a curly tail feather