ハクトウワシ vs European Roller
Haliaeetus leucocephalus 比較対象 Coracias garrulus
Side-by-Side Comparison
| 属性 | ハクトウワシ | European Roller |
|---|---|---|
| 学名 | Haliaeetus leucocephalus | Coracias garrulus |
| 目 | Accipitriformes | Coraciiformes |
| 科 | Accipitridae | Coraciidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 79.0 cm (31.1 in) | 31.0 cm (12.2 in) |
| 翼開長 | 203.0 cm (79.9 in) | 66.0 cm (26.0 in) |
| 体重 | 4300.0 g (151.68 oz) | 130.0 g (4.59 oz) |
| 食性 | Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … | Large insects, especially beetles, grasshoppers, and crickets. Also takes small reptiles, frogs, and scorpions. Hunts … |
| 一腹卵数 | 1-4 | 3-6 |
| 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.
European Roller
Warm, dry, open country with scattered trees and nest holes. Breeds in tree cavities, earth banks, and nest boxes.
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.
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
ハクトウワシ
North America from Alaska and Canada through the contiguous United States to northern Mexico.
European Roller
Southern and eastern Europe, Central Asia, and North Africa. Winters in sub-Saharan Africa.
保全状況
ハクトウワシ
European Roller
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
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
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。
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。