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Side-by-Side Comparison

属性	Russet-backed Thrush	Eastern Bluebird
学名	Catharus ustulatus	Sialia sialis
目	Passeriformes	Passeriformes
科	Turdidae	Turdidae
保全状況	Least Concern	Least Concern
体長	—	17.5 cm (6.9 in)
翼開長	19.4 cm (7.6 in)	27.0 cm (10.6 in)
体重	34.05 g (1.20 oz)	31.0 g (1.09 oz)
食性	--	Insects in summer, berries in winter. Hunts from low perches, dropping to the ground to …
一腹卵数	1-5	4-5
Population Trend	—	—

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Size Comparison

Body Length

Russet-backed Thrush —

Eastern Bluebird 17.5 cm

翼開長

Russet-backed Thrush 19.4 cm

Eastern Bluebird 27.0 cm

体重

Russet-backed Thrush 34.05 g

Eastern Bluebird 31.0 g

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Habitat Comparison

共通生息地

None

Russet-backed Thrush only

🌲 Forest

Eastern Bluebird only

🌾 Grassland

Eastern Bluebird

Open woodland, farmland edges, orchards, and parks with scattered trees and open ground. Readily uses nest boxes.

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Song & Call Comparison

Russet-backed Thrush

Eastern Bluebird

さえずり

A rich, melodious warbled 'chur-wi, tur-a-lee' song. Both sexes sing. Call is a soft, musical 'turee'. Song is gentle and flute-like, suggesting a small thrush. Given from exposed perch.

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Geographic Range & Migration

Russet-backed Thrush

Eastern Bluebird

Eastern North America from southern Canada to Honduras and Nicaragua. Partially migratory.

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保全状況

Least Concern

Russet-backed Thrush

Least Concern

Eastern Bluebird

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How to Tell Them Apart

Russet-backed Thrush

Eastern Bluebird

羽毛

Males are vivid royal blue above with a rusty-red breast and white belly. Females are grey-blue with a paler rust breast.

くちばし

Short, thin, dark bill

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About These Birds

Russet-backed Thrush

北米で繁殖し、中南米で越冬するツグミ（体長15〜17cm）。オリーブ褐色の上面と斑点のある胸が特徴。Catharus ustulatus（スウェインソンツグミ）は複雑で美しい鳴き声を持ち、夜間に渡りをする渡り鳥。高い声で上昇するスパイラルの歌声は野鳥ファンの間で特に愛されている。Turdidae科。

Eastern Bluebird

北米に生息するヒタキで、青い上面とオレンジ色の胸を持つ。巣箱の設置プログラムにより個体数が回復した。

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Related Comparisons

American Robin vs Eastern Bluebird

same-family

Common Kingfisher vs Eastern Bluebird

look-alike

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