![]() Young of the first brood will occasionally help raise their siblings in the second brood. The male continues to take care of the recently fledged young while the female begins to re-nest. Pairs may build their second nests on top of the first nest, or they may nest in an entirely new site. Bluebirds may raise two and sometimes three broods per season. ![]() ![]() However, some birds may switch mates during a breeding season to raise a second brood. Bluebirds are generally monogamous, staying together throughout the breeding season, and may breed together for more than one season.Only the female incubates the 4-6 eggs which she maintains at a temperature of 98 to 100✯. Nesting occurs from March through August.The Audubon Society’s Christmas Bird Counts from 1980 to 2004 also show a three-fold increase in population. According to the statistics from the Breeding Bird Survey, survey-wide estimates of the Eastern Bluebird population show an increase of 2.4% per year for each year since 1966.Habitat and nest cavities had been disappearing for many years, but bluebirds have made an incredible come back due to thousands of bluebird nest boxes being installed across the country. All bluebirds are cavity nesters and will use an artificial nest box. Bluebirds are found throughout North America including the Eastern, Western and Mountain Bluebirds. ![]()
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