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common name for a North American migratory bird of the family Turdidae (thrush family). The eastern bluebird, Sialia sialis, is among the first spring arrivals in the North. It is about 7 in. (17.8 cm) long. The plumage of the male appears vivid blue in bright light and black at a distance; the breast is cinnamon-red, the under parts white. The female's coloring is duller. The bluebird usually nests in orchards or on the edges of woodlands but will also use nesting boxes. As a destroyer of insects it is of great value; it also eats wild fruits. Related birds are the mountain, the western (genus Sialia) or chestnut-backed, and the Florida bluebirds. Bluebirds have a cheerful call and a sweet, warbling song. They raise several broods during a single mating season. The female is responsible for the incubation duties. Bluebirds are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Aves, order Passeriformes, family Turdidae.


1. any North American songbird of the genus Sialia, having a blue or partly blue plumage: subfamily Turdinae (thrushes)
2. fairy bluebird any songbird of the genus Irena, of S and SE Asia, having a blue-and-black plumage: family Irenidae
3. any of various other birds having a blue plumage
References in periodicals archive ?
Editor's note: Few songbirds occupy as important a place in our psyche as the eastern bluebird.
Starlings nested in 40 percent of boxes and 24 percent of tubes, whereas Eastern Bluebirds and Tree Swallows combined nested in 52 percent of boxes and 76 percent of tubes.
We documented this unusual behavior through personal observations and video recordings while conducting a study on nest defense and parental behavior of eastern bluebirds in Payne County, Oklahoma (36[degrees]06'31"N, 97[degrees]15'08"W), in 2009.
To further compare the nesting activity of eastern bluebirds with other cavity nesting species at the study site, we monitored a population of house wrens in a 1.
During the past 40 years" wrote bluebird expert Lawrence Zeleny in the June 1977 National Geographic, "the population of the eastern bluebird may have plummeted by as much as 90 percent.
From late May-July 2007, we located and monitored the nests of seven species known to breed in edge habitat: Tree Swallow (Tachycineta bicolor), Eastern Bluebird (Sialia sialis), Gray Catbird (Dumetella carolinensis), Brown Thrasher (Toxostoma rufum), Yellow Warbler (Dendroica petechia), Northern Cardinal (Cardinalis cardinalis), and Red-winged Blackbird (Yasukawa and Searcy 1995, Imbeau et al.
Evaluation of nest-box sites selected by eastern bluebirds, tree swallows, and house wrens.
We have investigated the signaling function of blue plumage in a wild population of eastern bluebirds and found that structurally-based plumage may act as a signal of male quality to conspecifics.
state ornithologist for the Massachusetts Division of Fisheries & Wildlife, the Eastern bluebird is indigenous to the area, having been around before the Europeans settled here.
In addition, eastern bluebirds utter alarm songs in the presence of potential nest predators (Gowaty and Plissner, 1998) that may serve to alert mates.
Declining and not rebounding were American crows, American robins, Eastern bluebirds, black-capped chickadees, Carolina chickadees, and tufted titmice, she and her colleagues report in the June 7 Nature.
The 57 square mile swamp hosts one of the state's largest breeding populations of Eastern bluebirds, as well as a thriving Great Blue Heron rookery.

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