Brent Goose vs White-winged Scoter
Branta bernicla 对比 Melanitta deglandi
Side-by-Side Comparison
| 属性 | Brent Goose | White-winged Scoter |
|---|---|---|
| 学名 | Branta bernicla | Melanitta deglandi |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 63.9 cm (25.2 in) | 54.0 cm (21.3 in) |
| 体重 | 1335.0 g (47.09 oz) | 1647.1666666666667 g (58.10 oz) |
| 食性 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dives for molluscs, crustaceans, and small fish in coastal and inland waters. Favours mussels and … |
| 产卵数 | 1-10 | 6-16 |
| 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.
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.
White-winged Scoter
Male produces a soft, whistled note; female gives a harsh, grating call. Similar to Velvet Scoter; the female's rasping call carries across North Pacific bays and coastal inlets.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
White-winged Scoter
Breeds in boreal forest and tundra of interior North America. Winters along Pacific and Atlantic coasts south to California and the Gulf states.
保护状况
Brent Goose
White-winged Scoter
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.
White-winged Scoter
Male is black with conspicuous white secondaries and a white comma-shaped mark below eye; orange-yellow bill with black basal knob. Female dark brownish-black with two pale facial patches and white …
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。
White-winged Scoter
白翅斑海番鸭是北美的大型黑色海鸭，雄鸟全身黑色，翼上具白色翼镜，眼下有白斑，嘴基肉瘤橙色。繁殖于加拿大西部和阿拉斯加的泰加林和苔原，越冬于北太平洋和大西洋沿岸。善深潜，以软体动物和甲壳类为食。常结大群在沿海越冬。