|Eastern Bluebird in my backyard|
I've taken the best features from research to create my own simple design, which I must say seems to be remarkably effective on my little patch of prairie. Five of the six bluebird nests I had this year were produced in the six nest boxes that I've built of my own design and the sixth box was simply empty (without a sparrow nest). The other ten boxes of commercial and other designs had only one bluebird nest among them, but two other nests from other species. At Photobucket, you can download a jpg of the "Roush Bluebird House" construction (page 1) and a diagram of how to cut up the boards (page 2) if you click on the links. It's cut from standard lumbar widths; cedar is best for durability. It's a similar box to the Peterson box, with a larger bottom and a lower entrance. I find front-opening boxes to be the easiest to clean.
So please, whatever design you choose, choose to help the Eastern Bluebird. I regret that I will never be able to see a Carolina Parakeet or Ivory-billed Woodpecker and I wasn't even responsible for those extinctions. I'd like my grandchildren to still be able to enjoy a flash of blue in their gardens.