Black Swan vs Ruddy-headed Goose
Cygnus atratus 比較対象 Chloephaga rubidiceps
Side-by-Side Comparison
| 属性 | Black Swan | Ruddy-headed Goose |
|---|---|---|
| 学名 | Cygnus atratus | Chloephaga rubidiceps |
| 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 | 190.0 cm (74.8 in) | 65.1 cm (25.6 in) |
| 体重 | 6200.0 g (218.70 oz) | 1756.8333333333333 g (61.97 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | -- |
| 一腹卵数 | 4-6 | 3-8 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Ruddy-headed Goose
Breeds on open tussock grasslands and moorland in Tierra del Fuego and the Falkland Islands. Mainland wintering population on Patagonian grasslands now critically small. Falkland Islands population relatively stable.
Song & Call Comparison
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.
Ruddy-headed Goose
A high, whistled 'whee' from males and a cackling rattle from females. Calls similar to Ashy-headed Goose. Falkland Islands population; calls in open coastal grassland.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Ruddy-headed Goose
保全状況
Black Swan
Ruddy-headed Goose
How to Tell Them Apart
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
Ruddy-headed Goose
Distinctive rufous-brown head and neck; body barred rufous and black above; underparts buff-white finely barred. Orange-yellow legs. White wing patches in flight. Compact; sexes similar. Falklands and Patagonia.
About These Birds
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。
Ruddy-headed Goose
ルディーヘッドガンは南米南端のパタゴニアとフォークランド諸島に分布する小型のガン科鳥類です。雄は赤褐色の頭部と白い腹が特徴的です。草地に生息し、草を採食します。フォークランド諸島の繁殖個体群は激減しており、絶滅危惧種です。