Bluebird Nest Boxes
Bluebirds and other native birds like Tree Swallows , Chickadees and Titmice nest in cavities. Because of development, a lot of their natural habitat is gone. You can help these birds survive and thrive by putting up a birdhouse, called a nestbox, that they can raise a family in. You can buy a nestbox (one specifically designed for bluebirds) at a birding store, or online, or you can make your own.
The best information on bluebird boxes can be found at the website of the National Bluebird Society.