Brent Goose vs Andean Goose
Branta bernicla 对比 Chloephaga melanoptera
Side-by-Side Comparison
| 属性 | Brent Goose | Andean Goose |
|---|---|---|
| 学名 | Branta bernicla | Chloephaga melanoptera |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 63.9 cm (25.2 in) | 86.3 cm (34.0 in) |
| 体重 | 1335.0 g (47.09 oz) | 2617.5 g (92.33 oz) |
| 食性 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Eats grasses, seeds, molluscs, and aquatic invertebrates; wades in shallow water; diet includes invertebrates year-round. |
| 产卵数 | 1-10 | 5-10 |
| 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.
Andean Goose
High-altitude puna grassland, bofedales (cushion bogs), and lakeshores at 3,500–5,500 m in the Andes from Peru through Bolivia and Chile to northwestern Argentina. Grazes beside glacial and alpine lakes.
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.
Andean Goose
A loud, cackling 'kek-kek-kek' from high-altitude Andean puna. Pairs are territorial and vocal. Calls carry well across open altiplano above 4,000 m elevation.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Andean Goose
Formerly widespread on the Mascarene Island of Réunion. Extinct in the 17th century; extirpated by hunting and introduced predators.
保护状况
Brent Goose
Andean 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.
Andean Goose
Entirely white plumage except black-tipped primaries and black tail. Bill and legs coral-pink. Larger than most Chloephaga. Sexes similar. Inhabits high Andean lakes and grasslands above 3,000 m.
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。
Andean Goose
安第斯雁是栖息于南美洲安第斯山脉高海拔湿地的特化雁类，可在海拔3000至5000米的高原湖泊生活。体羽白色，翼羽黑色，腿和嘴部橙红色，外形醒目。以高山草甸植物为食，通常成对或小群活动。分布范围从哥伦比亚南部至阿根廷北部。