Black Swan vs King Eider
Cygnus atratus 对比 Somateria spectabilis
Side-by-Side Comparison
| 属性 | Black Swan | King Eider |
|---|---|---|
| 学名 | Cygnus atratus | Somateria spectabilis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 130.0 cm (51.2 in) | — |
| 翼展 | 190.0 cm (74.8 in) | 53.3 cm (21.0 in) |
| 体重 | 6200.0 g (218.70 oz) | 1507.5 g (53.18 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Dives for sea urchins, molluscs, and crustaceans in Arctic coastal waters. Shifts to freshwater invertebrates … |
| 产卵数 | 4-6 | 1-16 |
| 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.
King Eider
Male produces a melodious, ascending ooo-wuh cooing; female gives a guttural grunt. The male's haunting, dove-like call is one of the most atmospheric sounds of the High Arctic in spring.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
King Eider
Circumpolar High Arctic breeder in North America, Greenland, Svalbard, and Russia. Winters at sea in the North Atlantic and Bering Sea.
保护状况
Black Swan
King Eider
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
King Eider
Male has bluish-grey crown, pale greenish cheeks, vivid orange-red frontal shield, black back and wings, and white breast patch. Female is warm rufous-brown with dark crescentic barring throughout.
About These Birds
Black Swan
The black swan was once considered impossible by Europeans who believed all swans were white, making it a famous philosophical example of inductive reasoning failure. It is the state emblem of Western Australia. Black swans form lifelong pair bonds and both parents share in incubation and care of cygnets.
King Eider
王绒鸭是北极的大型海鸭，雄鸟嘴基有橙红色大肉瘤，头部具复杂的白色、蓝色和绿色图案，体羽黑白相间，极为华丽；雌鸟棕褐色。繁殖于北极苔原，越冬于阿拉斯加和加拿大北部沿海。善深潜，以贻贝和甲壳类为食，常结大群在北极海面越冬。