Eastern Bluebird vs European Roller
Sialia sialis 比較対象 Coracias garrulus
Side-by-Side Comparison
| 属性 | Eastern Bluebird | European Roller |
|---|---|---|
| 学名 | Sialia sialis | Coracias garrulus |
| 目 | Passeriformes | Coraciiformes |
| 科 | Turdidae | Coraciidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 17.5 cm (6.9 in) | 31.0 cm (12.2 in) |
| 翼開長 | 27.0 cm (10.6 in) | 66.0 cm (26.0 in) |
| 体重 | 31.0 g (1.09 oz) | 130.0 g (4.59 oz) |
| 食性 | Insects in summer, berries in winter. Hunts from low perches, dropping to the ground to … | Large insects, especially beetles, grasshoppers, and crickets. Also takes small reptiles, frogs, and scorpions. Hunts … |
| 一腹卵数 | 4-5 | 3-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Eastern Bluebird
Open woodland, farmland edges, orchards, and parks with scattered trees and open ground. Readily uses nest boxes.
European Roller
Warm, dry, open country with scattered trees and nest holes. Breeds in tree cavities, earth banks, and nest boxes.
Song & Call Comparison
Eastern Bluebird
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.
European Roller
A harsh, grating 'rack-rack' or 'quarrk' in flight. Gives a variety of sharp nasal calls at the nest. Not melodic; primary vocalizations are alarm and contact calls.
Geographic Range & Migration
Eastern Bluebird
Eastern North America from southern Canada to Honduras and Nicaragua. Partially migratory.
European Roller
Southern and eastern Europe, Central Asia, and North Africa. Winters in sub-Saharan Africa.
保全状況
Eastern Bluebird
European Roller
How to Tell Them Apart
Eastern Bluebird
Males are vivid royal blue above with a rusty-red breast and white belly. Females are grey-blue with a paler rust breast.
Short, thin, dark bill
European Roller
Turquoise-blue head, breast, and tail. Chestnut-brown back. Vivid ultramarine blue and black wing patches visible in flight.
Short, stout, dark hooked bill
About These Birds
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。
European Roller
ヨーロッパで最も色彩豊かな鳥の一つで、求愛時にローリングと呼ばれる独特の空中飛翔を行う。