I've have a Stellar's jay nest under my front balcony that's been there for two years. I left the nest last year, and it was used by jays again this year. I also have a birdhouse that Titmouses have used two years in a row. But I think some birds are picky. The birdhouse used by a family of chickadees last year remained empty this spring. I guess that one will have to be cleaned out for next spring.