The Bluebird houses are equipped with a clear plexy glass so the bluebird nest will not be disturbed while viewing and have a raised screen floor to reduce blowfly infestations. The Bluebird houses come complete with predator guards and extended roofs. This product is designed with Recycled Poly-Lumber, made from recycled plastic jugs and bottles, to prevent cracking, splitting, or fading. Birds Choice has proudly reused and saved millions of plastic jugs from going into landfills. This product is manufactured in our Wisconsin facility. We currently operate out of a 50,000 sq. ft. manufacturing facility in Chilton, WI, employs 45 awesome team members, and remains committed to designing and creating the best darn products in our niches.