Brent Goose vs Kelp Goose
Branta bernicla 对比 Chloephaga hybrida
Side-by-Side Comparison
| 属性 | Brent Goose | Kelp Goose |
|---|---|---|
| 学名 | Branta bernicla | Chloephaga hybrida |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 63.9 cm (25.2 in) | 71.6 cm (28.2 in) |
| 体重 | 1335.0 g (47.09 oz) | 2735.0 g (96.47 oz) |
| 食性 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | -- |
| 产卵数 | 1-10 | 3-7 |
| 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.
Kelp Goose
Rocky wave-washed shores, sea channels, and kelp-fringed coasts of Patagonian Chile and Argentina south to Tierra del Fuego, and the Falkland Islands. Strictly coastal; almost never moves inland.
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.
Kelp Goose
A loud, nasal 'honk'. Male is mostly white and gives sharper calls; female is dark and gives softer, lower honks. Coastal Patagonian and Falklands habitat; highly vocal.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Kelp Goose
保护状况
Brent Goose
Kelp Goose
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.
Kelp Goose
Extreme dimorphism. Males entirely white with yellow bill and legs. Females dark brown barred white overall; yellow legs. Coastal species of rocky shores. Sexes so different they were once considered …
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。
Kelp Goose
洛岛雁是分布于南美洲南端麦哲伦地区及福克兰群岛的沿海雁类。体型中等，雄鸟头颈白色，体羽灰白色；雌鸟褐色带黑色横纹。主要栖息于岩质海岸，以潮间带海藻和草地植物为食。该物种有两个亚种，福克兰群岛亚种数量较多且相对稳定。