Whooper Swan vs Black-headed Duck
Cygnus cygnus 对比 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | Whooper Swan | Black-headed Duck |
|---|---|---|
| 学名 | Cygnus cygnus | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 116.4 cm (45.8 in) | 34.7 cm (13.7 in) |
| 体重 | 10350.0 g (365.09 oz) | 528.5 g (18.64 oz) |
| 食性 | Dabbling duck feeding on seeds, aquatic insects, and plant material; forages in shallow wetlands; diet … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 产卵数 | 2-12 | 2 |
| Population Trend | — | — |
Habitat Comparison
Whooper Swan
Breeds on boreal and subarctic lakes and boggy pools from Iceland and Scandinavia across northern Eurasia to Siberia. Winters on large lakes, estuaries, rivers, and agricultural fields in northwestern Europe and eastern Asia.
Song & Call Comparison
Whooper Swan
A loud, ringing 'wh-OOH-wh-OOH' bugle. Less high-pitched than Trumpeter; similar to Tundra Swan but deeper. Pairs call in musical antiphony. Carries very far over water.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
Whooper Swan
Breeds in Arctic tundra from Siberia to western Canada; winters along the Pacific coast from British Columbia to Mexico.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
保护状况
Whooper Swan
Black-headed Duck
How to Tell Them Apart
Whooper Swan
All-white plumage. Long yellow bill with large wedge-shaped yellow patch extending past nostrils, contrasting with black tip. Long flat head profile. Holds neck erect and straight. Juveniles pale gray-brown.
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
Whooper Swan
大天鹅是欧亚大陆最大的天鹅，全身白色，嘴部黄黑两色，以嘴基的大面积黄色区别于其他天鹅。繁殖于欧亚大陆北部和冰岛，越冬于西欧、日本及中国南部湿地。叫声嘹亮，飞行时翅膀发出有节律的鸣响。以水草、藻类和农田植物为食。
Black-headed Duck
黑头鸭是南美洲的寄生性鸭子，不自己筑巢，而将卵产于其他水鸟（包括其他鸭类、䴙䴘、红鹭等）的巢中，由寄主孵化并抚育。分布于阿根廷、乌拉圭、智利和巴西南部。雄鸟头部黑色，体羽深褐色；雌鸟头部褐色。是唯一真正的全职巢寄生鸭类。