Greylag Goose vs Black Swan
Anser anser 比較対象 Cygnus atratus
Side-by-Side Comparison
| 属性 | Greylag Goose | Black Swan |
|---|---|---|
| 学名 | Anser anser | Cygnus atratus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 130.0 cm (51.2 in) |
| 翼開長 | 87.1 cm (34.3 in) | 190.0 cm (74.8 in) |
| 体重 | 3297.5 g (116.32 oz) | 6200.0 g (218.70 oz) |
| 食性 | -- | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| 一腹卵数 | 3-12 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Greylag Goose
Breeds on moorland, bogs, freshwater wetlands, and lake margins across Eurasia from Iceland to central Asia. Winters on estuaries, agricultural fields, and wetlands. Feral populations year-round in parks.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Greylag Goose
A deep, loud 'aahng' honking. The ancestral goose of domesticated geese; its call is the template for the classic 'goose honk'. Flocks are highly vocal in flight.
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
Geographic Range & Migration
Greylag Goose
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
保全状況
Greylag Goose
Black Swan
How to Tell Them Apart
Greylag Goose
Large and heavy; uniformly gray-brown with pale feather fringes on back. Head and neck grayish-brown. Orange-pink bill; pink legs. Pale gray forewing conspicuous in flight. Ancestor of domestic geese.
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
About These Birds
Greylag Goose
ヨーロッパ、ロシアにかけて繁殖し、地中海周辺や南アジアで越冬するガン（体長75〜90cm）。灰褐色の体とオレンジ色の嘴が特徴的。Anser anser（ハイイロガン）は家禽のガチョウの祖先種で、最も大きく最も一般的な旧世界のガン。湿原、農地、川沿いに生息し、植物を主食とする。Anatidae科。
Black Swan
コクチョウはかつてすべての白鳥は白いと信じていたヨーロッパ人に不可能と考えられており、帰納的推論の失敗の有名な哲学的な例となっている。西オーストラリア州の州の鳥。コクチョウは生涯続く番いの絆を形成し、両親が共同で抱卵と雛の世話を行う。