Blue Jay vs Mariana Crow
Cyanocitta cristata 比較対象 Corvus kubaryi
Side-by-Side Comparison
| 属性 | Blue Jay | Mariana Crow |
|---|---|---|
| 学名 | Cyanocitta cristata | Corvus kubaryi |
| 目 | Passeriformes | Passeriformes |
| 科 | Corvidae | Corvidae |
| 保全状況 | Least Concern | Critically Endangered |
| 体長 | 28.0 cm (11.0 in) | — |
| 翼開長 | 42.0 cm (16.5 in) | 45.3 cm (17.8 in) |
| 体重 | 87.0 g (3.07 oz) | 235.66666666666666 g (8.31 oz) |
| 食性 | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … | -- |
| 一腹卵数 | 2-7 | 1-4 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
Song & Call Comparison
Blue Jay
A harsh, ringing 'jaay-jaay-jaay'. Also mimics Red-tailed Hawk and other species convincingly. Gives soft, liquid 'bell' calls and gurgling whispers in flocks.
Mariana Crow
Geographic Range & Migration
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
Mariana Crow
保全状況
Blue Jay
Mariana Crow
How to Tell Them Apart
Blue Jay
Bright blue upperparts with black barring on the wings and tail. White face and underparts with a black necklace. Prominent blue crest.
Stout, straight black bill
Mariana Crow
About These Birds
Blue Jay
アオカケスは鮮やかな羽毛と大きな鳴き声で知られるカラス科の大胆で知能が高い鳥。アオカケスは毎秋数千個のドングリを蓄えることでカシの木の重要な散布者となっている。複雑な社会的行動には、給餌器から他の鳥を追い払うためにタカの声を真似ることも含まれる。
Mariana Crow
マリアナガラス（Corvus kubaryi）— マリアナ諸島（グアムおよびロタ島）固有の絶滅危惧種。全身黒く森林に生息する。