ハクトウワシ vs Barn Owl

Haliaeetus leucocephalus 比較対象 Tyto alba

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Side-by-Side Comparison

属性 ハクトウワシ Barn Owl
学名 Haliaeetus leucocephalus Tyto alba
Accipitriformes Strigiformes
Accipitridae Tytonidae
保全状況 Least Concern Least Concern
体長 79.0 cm (31.1 in) 35.0 cm (13.8 in)
翼開長 203.0 cm (79.9 in) 90.0 cm (35.4 in)
体重 4300.0 g (151.68 oz) 350.0 g (12.35 oz)
食性 Primarily fish, also waterfowl, small mammals, and carrion. Hunts by swooping down to snatch fish … Almost exclusively small mammals, especially voles and mice. Hunts using extraordinary hearing to locate prey …
一腹卵数 1-4 2-16
Population Trend
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Size Comparison

Body Length
ハクトウワシ 79.0 cm
Barn Owl 35.0 cm
翼開長
ハクトウワシ 203.0 cm
Barn Owl 90.0 cm
体重
ハクトウワシ 4300.0 g
Barn Owl 350.0 g
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Habitat Comparison

共通生息地

ハクトウワシ only

None

Barn Owl only

None

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 Owl

Open farmland, grasslands, and marshes. Nests in barns, church steeples, tree cavities, and purpose-built nest boxes.

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Song & Call Comparison

ハクトウワシ

さえずり

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 Owl

さえずり

An eerie, drawn-out rasping shriek 'shreeeeee' — not a hoot. Also gives hissing, snoring, and bill-snapping when disturbed. Chicks call with a persistent rasping hunger call.

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Geographic Range & Migration

ハクトウワシ

North America from Alaska and Canada through the contiguous United States to northern Mexico.

Barn Owl

The most widespread owl and one of the most widespread land birds, found on every continent except Antarctica.

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保全状況

Least Concern

ハクトウワシ

Least Concern

Barn Owl

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How to Tell Them Apart

ハクトウワシ

羽毛

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.

くちばし

Large, hooked, bright yellow bill

Barn Owl

羽毛

Pale golden-buff upperparts with delicate grey mottling. Pure white heart-shaped face and white to pale buff underparts. Ghostly white appearance in flight.

くちばし

Pale pinkish hooked bill nearly concealed by the facial disc

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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 Owl

メンフクロウはあらゆるフクロウの中で最も非対称な耳を持ち、動物界最高の聴覚的方向定位能力を誇る。完全な暗闇の中でも音だけで獲物を捕まえることができる。特徴的なハート形の顔は放物線状の皿として機能し、ずれた両耳に音を集める。

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