Websites targeting keyword cavity nesting

General information on how to attract nesting bluebirds and other small cavity nesters, including distinguishing nests and eggs, heat, dealing with house sparrows, house wrens, nestboxes, etc.

Texas Bluebird Society is an all-volunteer grassroots organization helping bluebirds and other cavity-nesting birds through increasing nesting sites while sustaining and increasing their food supply (insects; berries of native plants)

Information on hosting native cavity-nesting birds, including tutorials, free nestbox plans, predator controls, tips, techniques and more.