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"https://secure." The mountain bluebird (Sialia currucoides) is a medium-sized bird weighing about 30 g (1.1 oz) with a length from 16–20 cm (6.3–7.9 in).They have light underbellies and black eyes. Information about birds and their nesting habits!
Some of our readers have provided photos and information on these species for us to include on this website, and we wish to thank them for their contributions. In remote areas, these birds are less affected by competition for natural nesting locations than other bluebirds. In North America, aside from the American Robin and bluebirds, most thrushes are birds of woodland and forest. This family includes well known birds such as the American Robin and bluebirds, and lesser known birds such as the Townsend's Solitaire of western mountain forests. Adult males have thin bills and are bright turquoise-blue and somewhat lighter underneath. They are partial to insects—studies indicate that up to 92% of their diet is composed of animal matter.
Most Hawaiian Solitaries, though, have become critically endangered or have gone extinct because of changes to their fragile habitat and susceptibility to avian malaria. It is an omnivore and it can live 6 to 10 years in the wild. Mountain, Western, and more recently Eastern bluebirds compete for nest boxes where their ranges overlap. The mountain bluebird was formally described in 1798 by the German naturalist Johann Matthäus Bechstein and given the name Motacilla s. Sylvia currucoides. SIALIA ARCTICA, Swains. Construction of nest boxes in suitable habitat has also provided a population boost. Populations are declining in areas where trees are too small to provide natural nesting cavities, and where forest and agricultural management practices have reduced the availability of suitable nest sites. Partners in Flight estimates the global breeding population of 4.6 million, with 80% spending some part of the year in the U.S., 20% breeding in Canada, and 31% wintering in Mexico.
Flight muscles are located between the belly and the breast. Western & Mountain Bluebirds. For this reason, the current evaluation status of the Mountain Bluebird is Least Concern.  The species is monotypic: no subspecies are recognised.. It is sexually dimorphic in the color of the plumage but the sexes are similar in size.  Their call is a thin 'few'; while their song is warbled high 'chur chur'. Their breeding habitat is open country across western North America, including mountainous areas, as far north as Alaska.
The mountain bluebird also inhabits much of western North America—often at elevations above 7,000 feet. Incubation normally last 14 days and the young will take about 21 days before they leave the nest.
Throat and breast are paler blue, and belly and undertail coverts are white. All juvenile thrushes are spotted on the underparts, a characteristic also shown by the adults of the Wood Thrush and a few other species.
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