Duck identification

[CptTr0ller]

Hrllo, can someone identify what breen and sex they are?
Sorry for quality, it is taken while they are in small, temporary cage.

 

[AnconaDuckFarm]

The one in the far back looks like a female. I cant tell with the other two...if they have a curled feather on their tail, they are male. Also, when they quack, a loud distinct quack is a female. A raspy whispering sound is a male.

 

[buff goose guy]

i can't see anything

 

[Amiga]

They look like Swedish or Swedish mixes, and I don't see any curly tail feathers. But I agree, the quack is a very important determining factor.

 

[CptTr0ller]

They look like Swedish or Swedish mixes, and I don't see any curly tail feathers.  But I agree, the quack is a very important determining factor.

Their quacks are low pitched. Also they are molting, showing green, white and even violet plumage.
EDIT: I think they are still immature and shows little diphormism

 

[Amiga]

http://www.majesticwaterfowl.org/artquacks.htm

 

[needlessjunk]

They almost look Muscovy-ish. How old are they? Very pretty though.

 

[CptTr0ller]

EDIT Cant upload more pics :/