Brent Goose vs Whooper Swan
Branta bernicla 对比 Cygnus cygnus
Side-by-Side Comparison
| 属性 | Brent Goose | Whooper Swan |
|---|---|---|
| 学名 | Branta bernicla | Cygnus cygnus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 63.9 cm (25.2 in) | 116.4 cm (45.8 in) |
| 体重 | 1335.0 g (47.09 oz) | 10350.0 g (365.09 oz) |
| 食性 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dabbling duck feeding on seeds, aquatic insects, and plant material; forages in shallow wetlands; diet … |
| 产卵数 | 1-10 | 2-12 |
| Population Trend | — | — |
Habitat Comparison
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
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
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
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.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Whooper Swan
Breeds in Arctic tundra from Siberia to western Canada; winters along the Pacific coast from British Columbia to Mexico.
保护状况
Brent Goose
Whooper Swan
How to Tell Them Apart
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
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.
About These Birds
Brent Goose
黑雁是小型海雁，繁殖于北极苔原，越冬于温带沿海地区。全身黑色，颈部有白色斑纹，腹部浅色或深色（因亚种而异）。以海草（大叶藻）和潮间带植物为食，高度依赖沿海湿地。在欧洲和北美分布有多个亚种，其中部分亚种数量因大叶藻减少而受到威胁。
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。