Pekin ducks-need information on sexing

[equine chick]

I went to the feed store today and I sucummbed to cuteness and bought 2 pekin ducks. They were straight run so not sure what i got. How can I tell the difference between them now or later? I also got 4 lil brown leg horns too.

 

[Katy]

The female will quack and the male will make more of a raspy noise when they get a little older. Also the male will get his drake curl, but that won't happen for several months. The voices will tell you sooner.

 

[Sparkalator]

As they get a little older the males head will be larger than the females.