ハクトウワシ vs Barn Swallow
Haliaeetus leucocephalus 比較対象 Hirundo rustica
Side-by-Side Comparison
| 属性 | ハクトウワシ | Barn Swallow |
|---|---|---|
| 学名 | Haliaeetus leucocephalus | Hirundo rustica |
| 目 | Accipitriformes | Passeriformes |
| 科 | Accipitridae | Hirundinidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 79.0 cm (31.1 in) | 19.0 cm (7.5 in) |
| 翼開長 | 203.0 cm (79.9 in) | 33.0 cm (13.0 in) |
| 体重 | 4300.0 g (151.68 oz) | 19.0 g (0.67 oz) |
| 食性 | Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … | Aerial insects caught in continuous agile flight, including flies, beetles, moths, and aphids. Drinks by … |
| 一腹卵数 | 1-4 | 2-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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.
Barn Swallow
Open farmland, meadows, and areas near water. Nests almost exclusively in human-made structures such as barns, bridges, and eaves.
Song & Call Comparison
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.
Barn Swallow
A rapid, twittering song: a long stream of 'vit-vit-vit' and rolling chirps. Also gives a sharp 'vit' flight call. Song can last many minutes without pause. Musical and liquid.
Geographic Range & Migration
ハクトウワシ
North America from Alaska and Canada through the contiguous United States to northern Mexico.
Barn Swallow
Breeds across the Northern Hemisphere in North America, Europe, and Asia. Winters in South America, Africa, and South Asia.
保全状況
ハクトウワシ
Barn Swallow
How to Tell Them Apart
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
Barn Swallow
Metallic blue-black upperparts, rufous forehead and throat, and pale buff to rufous underparts. Deeply forked tail with elongated outer streamers.
Short, wide, flat black bill adapted for catching insects in flight
About These Birds
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。
Barn Swallow
ツバメは世界で最も広く分布するツバメ科の種で、スズメ目の中でも最長の渡りを行うもののひとつ。北半球全体にわたってその到来が春の訪れを告げ、古代ギリシャから現代の詩に至るまで文化的な言及を生んできた。ツバメは営巣にほぼ完全に人工構造物を利用するようになっている。