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In the United States there are three species of Bluebirds: Eastern, Western, and Mountain. All three nest in cavities (holes) in tree that are normally crated by woodpeckers. Originally, Eastern Bluebirds were very common across the eastern half of the US, but with the introduction of European Starlings who aggressively takeover nesting holes, their population has rapidly declined.

To help bluebird populations, many people and organizations began building bluebird houses. These bluebird houses have openings that are the exact size of bluebirds and sometimes have wire tubing at the entrances that discourage other birds (like Starlings) from nesting there.

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14y ago

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