Confusion

[Rememberthedeer]

I have three Pekin Ducks and they are five months old. But I am having trouble figuring out their gender. If I post photos will somebody be able to identify whether they are male or female?
This is Gimli. I'm pretty sure it's a boy...

This is Arboc. I'm pretty certain he's a boy too...

This is Nonoriah. I honestly have no idea what this one is. Sometimes the feather on the back of it's tail is curled up a little, sometimes it's laying flat. To me, all their quacks sound the same. Does anybody know if this duck is a boy or girl?

 

[AvianEgo]

If all their quacks sound the same i would bet you have 3 boys there. The third one sill has a curl, just not as pronounced.

 

[Rememberthedeer]

Ok, thanks