I have three Pekin Ducks and they are five months old. But I am having trouble figuring out their gender. If I post photos will somebody be able to identify whether they are male or female? This is Gimli. I'm pretty sure it's a boy... This is Arboc. I'm pretty certain he's a boy too... This is Nonoriah. I honestly have no idea what this one is. Sometimes the feather on the back of it's tail is curled up a little, sometimes it's laying flat. To me, all their quacks sound the same. Does anybody know if this duck is a boy or girl?