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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 ?
However, infanticide, which has been observed in many bird species including Eastern Bluebirds, is clearly not displaced parental care and is likely an adaptive behavior.
More pronounced diurnal patterns have been reported for Eastern Kingbirds (Tyrannus tyrannus) (Morehouse and Brewer 1968), Eastern Bluebirds (Pinkowski 1978), and Nashville Warblers (Knapton 1984) for which provisioning rates decreased in the middle of the day and increased later in the day.
Western Bluebirds commonly beat invertebrate prey against a perch before consumption, and both Flanigan (1971) and Pinkowski (1974) reported Eastern Bluebirds beating vertebrate prey items against perches before consuming them.
Reproductive success and developmental stability of eastern bluebirds on golf courses: evidence that golf courses can be productive.
A century ago, Eastern bluebirds were among the commonest songbirds in America.
However, two adult male eastern bluebirds actively defending a single nest-box has only been documented once previously (Laskey, 1947).
Nest parasitism by Eastern Bluebirds is rare, but known hosts include Carolina Wren (Thryothorus ludovicianus), chickadees, and House Sparrows (Gowaty and Plissner 1998).
Eastern bluebirds have long been the displaced darlings of Pennsylvania's spring, as well as the poster bird for what can go wrong when people introduce non-native species to a new area.
European Starling, which competes for nest cavities with Eastern Bluebirds and smaller woodpeckers, was found only along Bole Woods/Sugarbush and Pierson Creek East transects.
Eastern bluebirds (Sialia sialia), Bewick's wrens and great crested flycatchers (Myiarchus crinitus) used larger and smaller cavities available in nest boxes (Table 1).
Other Eastman wildlife habitat projects included establishing a nest box monitoring program for eastern bluebirds, American kestrels, barn owls, and purple martins; planting wetland vegetation; installing wood duck nest boxes; enhancing a wetland area; planting wildflowers; developing a database of wildlife inventory found on the plant site; and a variety of other projects that enhance and protect wildlife and land on unused Eastman property.

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