Enjoy the beauty, songs and behavior of your very own Bluebird family in your own backyard! As our environment becomes more dangerous each year, it becomes increasingly important to provide housing for Bluebirds to birth and raise their young. Heath Bluebird Houses have been a long-time favorite of Bluebird enthusiasts, and have graced America's Backyard for decades. This model now has easy front opening for cleaning. 1.5" Entrance hole.