bluebird
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The eastern bluebird is found throughout the eastern part of North America, where it may be seen perching on fences. Bluebirds nest in holes in tree trunks; both male and female build the nest. The female lays four or five eggs and incubates them for about two weeks. The young leave the nest after two to three weeks. Usually two broods are produced each year.
Three species of a North American bird, genus Sialia, belonging to the thrush subfamily, Turdinae, order Passeriformes. The eastern bluebird Sialia sialis is regarded as the herald of spring as it returns from migration. About 18 cm/7 in long, it has a reddish breast, the upper plumage being sky-blue, and a distinctive song. It lays about six pale-blue eggs.
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