Maybe she has another nest. Is she behaving broody! If you arent sure what a broody duck behaves like, you can probably find a video on youtube. I am going to upload some of mine but haventnyet.
Basically they wander around all hunched up with their beaks open, and often close to the ground and they are loud. They will let out a few short high pitched ish quacks, then one much deeper louder "QUACK!" And kinda race about the place really quickly.
Its like dukduckduk...(pause) DUUUUUCCCK! Repeated over and over.
Often you only see them at mealtimes.. And they can arrive with a horrendous smell if the nest is close by as the moment they get off it they do whawt I call I broody sh-t! (A huge really skank smelling poop, the result of not pooping for hrs on the nest)
They will attack females they usually get on with, drakes will often find them irrestible (and while the odd one will attack amorous drakes, most dont, i wish they would). They will attack juvenile males though.
Their whole attitude is this really cute, loud sort of
"Look at me Im BROODY, and Im really super busy, making ducklings, outta my way, omg...sooo busy...sooo broody... Thats me."
Anyway if you arent sure if she is broody, search youtube for some videos of broody ducks, the behavious is pretty easy to recognise one you know what to look for.
If thats not it, maybe shes just in a b-tchy mood lol, or doesnt like the girls shes attacking... Or they both want the same drake. Or one who was happy to be lower in the pecking order than the other has now changed her mind and decided she should challenge that girl up in the next rung, and move her way up in the world...
