ハクトウワシ vs Common Starling
Haliaeetus leucocephalus 比較対象 Sturnus vulgaris
Side-by-Side Comparison
| 属性 | ハクトウワシ | Common Starling |
|---|---|---|
| 学名 | Haliaeetus leucocephalus | Sturnus vulgaris |
| 目 | Accipitriformes | Passeriformes |
| 科 | Accipitridae | Sturnidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 79.0 cm (31.1 in) | 21.5 cm (8.5 in) |
| 翼開長 | 203.0 cm (79.9 in) | 37.0 cm (14.6 in) |
| 体重 | 4300.0 g (151.68 oz) | 78.0 g (2.75 oz) |
| 食性 | Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … | Omnivorous — insects and larvae (especially leatherjackets), earthworms, fruit, and seeds. Probes soil with open … |
| 一腹卵数 | 1-4 | 4-7 |
| 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.
Common Starling
Open countryside, farmland, parks, and urban areas. Forms enormous communal roosts in winter, especially in urban environments.
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.
Common Starling
A complex mimic: rattles, whistles, clicks, and squeaks mixed with imitations of other birds. Song is a continuous medley. Also gives harsh 'scheer' alarm and chattering.
Geographic Range & Migration
ハクトウワシ
North America from Alaska and Canada through the contiguous United States to northern Mexico.
Common Starling
Native to Europe, western Asia, and North Africa. Introduced to North America, South Africa, Australia, and New Zealand.
保全状況
ハクトウワシ
Common Starling
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
Common Starling
Glossy black plumage with iridescent purple and green sheen in breeding season. Winter plumage shows white spotting. Short tail and pointed wings in flight.
Long, pointed bill — yellow in breeding season, dark in winter
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。
Common Starling
ホシムクドリ（Sturnus vulgaris）— ユーラシア原産で北米・豪州・南アフリカに移入された。金属光沢のある羽と白い斑点が特徴。巨大な群れ（マーモレーション）を形成する。