Hi all. We are having a difficult time determining how many males and females we have out of our group of 7, five 1/2 week old Muscovy ducklings. One is very obvious he is a boy as is neck sticks out further, his legs are tall and thick, and he is just much bigger than his siblings. One of them has a very interesting color pattern we have not had before either, so I'd be curious if anyone knows what it is (pied, ripple, etc.) That one also sometimes looks like a male, and then other days I think, no its a female. I've never had this much trouble telling the sex before, even at this age, but this group of siblings are making it really hard. Here are some pics:

This is the one with the interesting coloring - and the one where I think male somedays, and other days I think female. It started out as a all yellow duckling. Its mother is chocolate and white, and its father could be a solid black (with just tiny flecks of white on chest) or a solid chocolate.

These three on the right (front) I think are female, but not entirely sure. Here's another pic of them:

any help or comments are appreciated!
This is the one with the interesting coloring - and the one where I think male somedays, and other days I think female. It started out as a all yellow duckling. Its mother is chocolate and white, and its father could be a solid black (with just tiny flecks of white on chest) or a solid chocolate.
These three on the right (front) I think are female, but not entirely sure. Here's another pic of them:
any help or comments are appreciated!