Black Swan vs White-headed Duck
Cygnus atratus 比較対象 Oxyura leucocephala
Side-by-Side Comparison
| 属性 | Black Swan | White-headed Duck |
|---|---|---|
| 学名 | Cygnus atratus | Oxyura leucocephala |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Endangered |
| 体長 | 130.0 cm (51.2 in) | — |
| 翼開長 | 190.0 cm (74.8 in) | 29.7 cm (11.7 in) |
| 体重 | 6200.0 g (218.70 oz) | 705.0 g (24.87 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Dives for aquatic invertebrates, seeds, and plant roots in Mediterranean and Central Asian wetlands. Critically … |
| 一腹卵数 | 4-6 | 3-10 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
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.
White-headed Duck
Male produces a mechanical, rapid bill-drumming; female gives a harsh, grating quack. The drumming staccato display is the same pattern as other Oxyura stiff-tails; heard on Eurasian steppe lakes.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
White-headed Duck
Breeds in Spain, Turkey, central Asia, and Mongolia. Winters in the Mediterranean, the Middle East, and northern India. Globally endangered.
保全状況
Black Swan
White-headed Duck
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
White-headed Duck
Male has entirely white head with small black crown patch, rich chestnut-brown body, and large bulbous powder-blue bill. Female is brown with pale whitish face divided by dark streak across …
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。
White-headed Duck
カオジロオキアミガモは地中海地方から中央アジアにかけて分布する絶滅危惧種のカモです。雄の白い頭部と青い嘴が特徴的です。水草が豊富な浅い湖や池に生息し、水草の種子、塊茎、無脊椎動物を潜って採食します。生息地の減少と外来種との交雑が脅威です。