Call duck gender?

[Jen_naay]

Hi-

I am a new duck owner and I only have one call duck, the others are Pekins/Cayuga. I’ve figured out the sex of the others but not the call. He/she is quiet and doesn’t make much noise but when it does it is loud.. It almost sounds like a loud honk/squeak. Any ideas on what it could be or anything else I can look for? They are almost 3 months old.
Thanks

 

[sourland]

'Loud' is generally a duck hen.