Rouen gender guesses?

[Hannahhubers]

This is my Rouen duck, I have another one with they exact same markings and size. They make the same noises as well.(just your typical Quack) They are 6 weeks old. Do the markings indicate any specific gender?
Thanks in advance!
Hannah

 

[sourland]

Going by the bill color, not 100%, I think it's a duck. Drakes generally have a more olive colored bill while ducks have a brown/black bill.