Crested ducks- gender?

[ChickenPeep]

Hi there!
I'm more of a chicken person than a duck person, but my grandma got some crested ducks around Easter time and I have to wonder what gender they are. They have no distinguishingly male or female features so I wasn't sure whether they were male or female. She had 5 to begin with but now there are only 2 and I was just hoping they would be a couple. They're not tame and just swim around our lake house so I won't be able to handle them to find out thier gender if needed.

Thanks!

 

[duckylove2]

If one of them or both them are males you can tell by the tale, it will have one curled feather.

 

[TLWR]

They may not have a drake feather on the tail yet. My male that was an early April hatcher is just starting to show a drake feather.

You can tell by quacking or rasping. If it is a true quack, it is a girl. If it is a very hoarse attempt at a quack, it is a boy.

 

[Goronson Chicks]

I have a group of 6 White Crested, one Golden Hybrid and one Khaki Campbell that I bought as 2 day old chicks on April 17. They are now almost 2 months old. Only one White Crested has a quack. The rest have a rasp. None have the curly tail. Which are they - drake or duck?