I really have no idea how to determine this but per google I think they may both be female. Here's a link to a Google drive with a couple of videos
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Hi All,
We have 2 beautiful ducks we inherited from a college aged family member who had no idea what he was getting into when he took them in as hatchlings. He raised them indoors and they are fantastic with him but he lived in a small studio apartment on campus and was at risk of being...