What gender are my Muscovy ducks?

[Shianna Ree]

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[Shianna Ree]

 

[quackingdom]

I only see two pictures...of a dark-colored one. It looks like a female. Not quite sure though.

 

[Bengt747]

Not positive either, but it sort of looks like they are both drakes. The heads are big and blocky, and the bills have lots of red at their base.

Based on their size, I would guess that they're almost large enough to gauge drake from hen using their vocalization. Young hens will make the adult hen whining/squalling noise when you pick them up, whereas drakes switch from the Muscovy peep to more of a deep hiss. This method might be more effective a month or two from now when the ducks have a little more time to develop their adult vocals.