Call duck colour and sex help!

[katiecallduck]

I am new to byc and need some help identifying the colours and possibly sex of 4 of my babies! They are now between 8 and 9 weeks old and my 5th baby is definitely a girl as she sounds just like her mother. Here are some pictures:

Thanks people!

 

[duck4u]

2x white call ducks
1x chocolate call ducks
1x lavender call ducks
2x Pastel call ducks
There is no way to tell gender, only by weighing, and size relation.
But I think call ducks have those ''drake'' feathers (Curly feathers that appear at the base of the tail) which only male ducks sometimes have.
But smaller (female) bigger (Male) size.

 

[katiecallduck]

Thanks, I just hope the 4 coloured ones aren't all boys, I was hoping the light beige coloured one was a girl due to it being lighter in colour, and I've heard one of the grey coloured ones do a solid 'quack' but still not sure I already have 2 males and I know the 2 white ones are females as one is the mother and her white baby sounds just like her.