American Crow vs ハクトウワシ
Corvus brachyrhynchos 比較対象 Haliaeetus leucocephalus
Side-by-Side Comparison
| 属性 | American Crow | ハクトウワシ |
|---|---|---|
| 学名 | Corvus brachyrhynchos | Haliaeetus leucocephalus |
| 目 | Passeriformes | Accipitriformes |
| 科 | Corvidae | Accipitridae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 45.0 cm (17.7 in) | 79.0 cm (31.1 in) |
| 翼開長 | 99.0 cm (39.0 in) | 203.0 cm (79.9 in) |
| 体重 | 450.0 g (15.87 oz) | 4300.0 g (151.68 oz) |
| 食性 | Highly omnivorous — insects, earthworms, seeds, fruit, eggs, nestlings, carrion, and human food waste. Among … | Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … |
| 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.
ハクトウワシ
Large bodies of open water including coasts, rivers, and lakes with abundant fish and old-growth trees for nesting.
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.
ハクトウワシ
High-pitched, chattering whistle: a rapid 'kleek-kik-ik-ik-ik'. Surprisingly weak and thin for such a large raptor. Also gives a lower 'kwit-kwit' call near the nest.
Geographic Range & Migration
American Crow
North America from southern Canada through the United States to northern Mexico.
ハクトウワシ
North America from Alaska and Canada through the contiguous United States to northern Mexico.
保全状況
American Crow
ハクトウワシ
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
ハクトウワシ
Adults have a dark brown body with a striking white head and tail. Juveniles are mottled brown and white, reaching full adult plumage at age five.
Large, hooked, bright yellow bill
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。
ハクトウワシ
ハクトウワシはアメリカ合衆国の国鳥で国の象徴である。DDT農薬使用により一度は絶滅の危機に瀕したが、見事な回復を遂げ、2007年に絶滅危惧種リストから外された。これらの力強い猛禽類は、2トンを超えるものもある鳥類最大の木の巣を作る。