This premium cedar wood Bluebird House is built specifically to attract various bluebirds with a 1 9/16 inch entrance hole and a metal port. Heavy lumber construction allows for superior weather resistance and the front opens for easy inspection, ventilation, drainage and cleaning. Mount the house on a 5-6 foot pole, and ensure that the entrance hole does not face the direction of storms. Space houses at least 200 feet apart to prevent territorial conflict. Made in the USA.