Black Swan vs Scaly-sided Merganser
Cygnus atratus 对比 Mergus squamatus
Side-by-Side Comparison
| 属性 | Black Swan | Scaly-sided Merganser |
|---|---|---|
| 学名 | Cygnus atratus | Mergus squamatus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Endangered |
| 体长 | 130.0 cm (51.2 in) | — |
| 翼展 | 190.0 cm (74.8 in) | 51.2 cm (20.2 in) |
| 体重 | 6200.0 g (218.70 oz) | 1145.8 g (40.42 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Dives for fish in fast-flowing East Asian rivers. Endangered; highly piscivorous with serrated bill adapted … |
| 产卵数 | 4-6 | 4-14 |
| 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.
Scaly-sided Merganser
Male gives a quiet, low grunting call; female produces a guttural, croaking series. Endangered; calls are poorly known; similar to Red-breasted Merganser but quieter in Manchurian forest rivers.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Scaly-sided Merganser
Breeds in southern Russia, northern China, and the Russian Far East. Winters in southern China and Korea. Found on fast-flowing forested rivers.
保护状况
Black Swan
Scaly-sided Merganser
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
Scaly-sided Merganser
Male has iridescent dark green head with long flat crest, white body with distinctive black scaly pattern on flanks, and black back with white patches. Female has brownish-red crested head …
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.
Scaly-sided Merganser
中华秋沙鸭是东亚特有的濒危秋沙鸭，繁殖于中国东北和俄罗斯远东地区，越冬于中国中南部和朝鲜半岛。雄鸟头部深绿色有冠羽，体侧具黑色鳞状斑纹，腿橙色。由于森林砍伐、河流污染和猎捕，被列为濒危物种，估计野生数量约1000至2500只。