Hello! I'm fairly new to owning ducks. I have a trio of 21 day old Call Ducks that I need to figure out how to sex. I may have an idea but I want to ask the more experienced ones on here. I have read on the internet that it can also be done by their chirps!? I need the best ways to do this please! Thanks! Keyt Possible female Possible male Possible female. This one is MUCH bigger than the other two!