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These days, most bluebird enthusiasts have multiple nestboxes up, thus giving bluebirds and tree swallows plenty of nesting possibilities, but there are many areas that are very deficient of much ...
A male eastern bluebird clings to the opening of the pair's chosen nest box. Bluebirds have two or three nestings per year so do not give up trying to attract them.
Predators of young bluebirds in the nests can include snakes, cats, and raccoons. Bird species competing with bluebirds for nesting locations include the common starling, American crow, and house sparrow, which take over the nesting sites of bluebirds, killing young, smashing eggs, and probably killing adult bluebirds. [6] Male western bluebird
Adult female in Livermore, California. The western bluebird is a small stocky bird with a length of 15 to 18 cm (5.9 to 7.1 in). The adult male is bright blue on top and on the throat with an orange breast and sides, a brownish patch on back, and a gray belly and undertail coverts.
Volunteers at Maybury State Park keep an eye on bluebird nesting boxes, watching for predators, counting eggs and fledglings.
The eastern bluebird (Sialia sialis) is a small North American migratory thrush found in open woodlands, farmlands, and orchards. The bright-blue breeding plumage of the male, easily observed on a wire or open perch, makes this species a favorite of birders.
The nest is preferentially built at a height in the trees of 3 to 10 m (10 to 33 ft). It is cup-shaped and composed of twigs, small roots, bark strips, moss, other plant material, cloth, paper, and feathers, with occasional mud added to the cup. Blue jays are not very picky about nesting locations.
Excitement grows with flights of snow geese, sandhill cranes, and white pelicans; evidence of paired birds and early nests; the crescendo of early-morning bird song, and the so-called first robin ...