Mandarin duck sex?

[ABBandit]

Hello everyone, I have 2 mandies that are about 7 weeks old. From the looks of them, I believe to have a male and female, but I’m not too sure, here are some pics, maybe some of you will know? One of them has a little bit more red on the bill and has those longer little feathers with some white and the other doesnt. The one with the red bill is a wee bit bigger than the other. I know these photos aren’t too great; they were moving too much, however, I can take pictures again if needed.
Thanks

 

[Isaac 0]

I'm not familiar with Mandies, but if you post back in a week or two, we should be able to tell by coloration.

Welcome to BYC!