In reply to the post about screech owls not hatching, my bluebirds nest boxes this year have produced 5 eggs, but only 3 have hatched. In some cases only 1 has hatched. Also in some cases one egg was laid, and then the nest abandoned. The only difference this year is that it has been hotter for April and even March. There are plenty of bluebirds flying about on my place and there is a bug in every beak, but not many babies. Patricia Peacock Oakland, Texas (two miles north of Ridgeway, northeast of Dallas)