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If you love bluebirds, you may want to add a birdhouse to your property. There are plenty of options on the market ranging from pre-built houses to simple, easy to build ones. The basic idea is to provide a safe place for bluebirds to nest that doesn't interfere with their natural behavior or attract predators like cats and other birds looking for a meal. Bluebirds cannot dig their own cavities so they depend on woodpeckers to excavate them or retired men to build them a home. In occupy existing holes in tree trunks,