Please help

[Quackers n milk]

Would my duck be sitting on an in unfertilized nest

 

[Miss Lydia]

Would my duck be sitting on an in unfertilized nest

Probably they just get the broody feeling and will brood. It's all about the eggs not fertilization.

 

[TLWR]

Yep. Chickens do it too. I have a Buff Orpington sitting now on nothing. There are no eggs and have been no eggs, she just decided she wanted to sit and therefore, that's what she is doing