We have been blessed to have bluebirds nest in our bluebird house for several seasons now. When I noticed the male and female tending to the box this spring, I took a photo of the nest which showed 5 perfect bluebird eggs (4/29). Two - three days later we noticed that the pair was no longer tending to the nest. The male began to charge at his image in our windows all day every day. The female could be seen at the suet feeder from time to time but not at the bluebird house. A closer check of the house revealed a clump of pinestraw protruding from the entry and so I checked the nest. It appeared that the eggs had been stolen (by raccoons?) and only a small piece of shell was left. The birds were no longer tending to the nest and so I cleaned it out and the pole was greased with cayenne pepper to deter raccoons. Another few days went by and I noticed that the pair was tending to the box again. I waited a few more days and took a photo on 5/10 of the new nest which showed 4 white eggs in it. Ever since then the female bluebird has been diligent in tending the nest, but the male rarely goes to it. I checked the box again today 6/7 and the eggs have not yet hatched. It seems that the hatching is overdue. Are these indeed bluebird eggs? I will avoid removing anything from the nest but I'm just curious about might be going on here. Any advice? The photo from 5/10 is attached.