She seems to have won the BB lady fight the other day, and is definitely a different one. There is a male hanging around with her as well. She has started to bring nesting material into the box and tried to bury the four eggs that have been in there, so after careful consideration, I have removed the four eggs that have been in the box before. The first ones had been laid at the end of March, and not been incubated. The Gilbertson box is on the small side and can only be opened from the top. If the four abandoned eggs would have sat under a new nest with babies and got crushed, the contents could have seeped into the nest, luring in insects, and a nest change would not have been easy. I try to interfere as little as possible with the nestbox, which works well with the camera. This is also how I was able to see what was going on in the nest. You have to always make sure that things are what they look like before you act if you face a situation like that. It is illegal to remove native bird eggs from an active nest.