The Eastern Bluebird Poly Box from The Nest Box Barn is tailor-made for the eastern bluebird and native tree swallow. It is built using a PVC box structure along with a cedar roof and mounting base that is resistant to decay. The birdhouse is designed to be almost completely waterproof, with excellent ventilation, a fledging ladder, and a built-in nest lift. It can be mounted on a 1/2 inch conduit pipe or post, and can be easily removed from its roof structure for cleaning and nest inspections with just one hand.