Black Swan vs Hartlaub's Duck
Cygnus atratus 对比 Pteronetta hartlaubii
Side-by-Side Comparison
| 属性 | Black Swan | Hartlaub's Duck |
|---|---|---|
| 学名 | Cygnus atratus | Pteronetta hartlaubii |
| 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) | 53.4 cm (21.0 in) |
| 体重 | 6200.0 g (218.70 oz) | 910.0 g (32.10 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Eats seeds, aquatic invertebrates, and plant matter; dabbles in ponds and marshes; diet more invertebrate-heavy … |
| 产卵数 | 4-6 | 7-11 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Hartlaub's Duck
Tropical rainforest streams, forest pools, and shaded swamps from Guinea and Sierra Leone east through the Congo Basin to Uganda and western Kenya. Requires undisturbed riverine forest with shaded water.
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.
Hartlaub's Duck
A low, nasal 'quack' and soft 'kek-kek'. Generally quieter than other perching ducks. Calls from dense Central and West African rainforest where it is rarely observed.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Hartlaub's Duck
Breeds in wetlands across Eurasia; winters from Africa and the Middle East to South and Southeast Asia.
保护状况
Black Swan
Hartlaub's 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
Hartlaub's Duck
Dark chocolate-brown body; white patches at side of head distinctive. Males have dark blue frontal shield extending from bill. Wings show pale blue-gray inner forewing. Legs gray. West African forest …
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.
Hartlaub's Duck
哈氏鸭是中西非特有的林栖鸭，分布于喀麦隆、加蓬、刚果等热带雨林地区。外形独特，介于树鸭和真正的鸭之间，被置于单型属中。雄鸟头颈蓝黑色，体羽棕褐色；雌鸟相似但较暗淡。栖息于热带雨林的河流和溪流，习性较隐秘，相关生态学研究较少。