How old is a mallard when she goes broody?

[chardin29]

I have three sixth month old pekin ducks and two three month old mallards. My pekins have made a nest and started to lay eggs a few days ago. Today when I went out to the coop my mallard was laying on them. When I fed all of them she didn't get up. Can a mallard duck go broody at just three months old when she isn't laying yet? I was going to get an incubator to hatch some eggs, so I'm hoping she stays put.

 

[Amiga]

I think Elf, Sechs and Fünf were maybe five months old when they started getting broody the first time. With mine, only Fünf has been a full-time broody every year. Sechs will occasionally go full-on broody, and so will Romy. Elf seems to like to be assistant broody.