Sexing ducks by head?

[LooseyGoosey]

I was just looking at my ducks (I have five pekins and two khaki campbell) and I noticed that some of them had larger head/neck. They look like the curve of their neck where it meets the head stands up noticeably further than the others. You can see it really easily when looking at them from the side, like they are just thicker and fuller there. Is this any indication of gender?

 

[Frindizzle]

Yes, it is. It is the same with our male Pekin and female!

Like if this helped!

 

[Going Quackers]

Somewhat BUT the voices will be the true indicator.. ducks are full on quacks, drakes have a raspy undertone.. sound almost hoarse. How old?