American Crow vs Mariana Crow
Corvus brachyrhynchos 比較対象 Corvus kubaryi
Side-by-Side Comparison
| 属性 | American Crow | Mariana Crow |
|---|---|---|
| 学名 | Corvus brachyrhynchos | Corvus kubaryi |
| 目 | Passeriformes | Passeriformes |
| 科 | Corvidae | Corvidae |
| 保全状況 | Least Concern | Critically Endangered |
| 体長 | 45.0 cm (17.7 in) | — |
| 翼開長 | 99.0 cm (39.0 in) | 45.3 cm (17.8 in) |
| 体重 | 450.0 g (15.87 oz) | 235.66666666666666 g (8.31 oz) |
| 食性 | Highly omnivorous — insects, earthworms, seeds, fruit, eggs, nestlings, carrion, and human food waste. Among … | -- |
| 一腹卵数 | 3-7 | 1-4 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
American Crow
Extremely adaptable — found in farmland, open woodland, suburban neighborhoods, parking lots, and urban parks.
Song & Call Comparison
American Crow
Classic 'caw-caw-caw' repeated in series. Family groups use distinct dialects. Also gives rattling, knocking, and a short 'cah' flight call. Highly social and vocal.
Mariana Crow
Geographic Range & Migration
American Crow
North America from southern Canada through the United States to northern Mexico.
Mariana Crow
保全状況
American Crow
Mariana Crow
How to Tell Them Apart
American Crow
All black with a slight glossy sheen. Squared-off tail and smooth throat distinguish it from the common raven.
Straight, sturdy black bill smaller than a raven's
Mariana Crow
About These Birds
American Crow
北米全域に広く分布する大型のカラス（体長40〜53cm）。全身光沢のある黒で、知性が高く強い社会性を持つ。Corvus brachyrhynchos（アメリカガラス）は北米で最もよく見られるカラスで、交通量の多い道路に堅い木の実を置いて車に割らせる「道具使用」が観察されている。Corvidae科。
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。