Man, it's hard to figure out who/why.The problem is, was she the egg breaker or just taking advantage? I may just have to keep pulling birds until I'm able to ID the guilty party. I did put a couple ceramic eggs in there.
Was any shell left to determine if it was a weak shell thus easily broken?
How old in months?I caught one of my yearlings coming out of the nest box on a scouting trip
Had a nest messing scouter once, she was batshitcrazy(long sad story)....and delicious.