Cape Teal vs Brent Goose
Anas capensis 对比 Branta bernicla
Side-by-Side Comparison
| 属性 | Cape Teal | Brent Goose |
|---|---|---|
| 学名 | Anas capensis | Branta bernicla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 38.6 cm (15.2 in) | 63.9 cm (25.2 in) |
| 体重 | 423.8333333333333 g (14.95 oz) | 1335.0 g (47.09 oz) |
| 食性 | Dives for molluscs, crustaceans, and aquatic invertebrates; digs in mudflats; diet heavily invertebrate year-round. | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| 产卵数 | 5-15 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Cape Teal
Saline, alkaline, and freshwater lakes and pans across sub-Saharan Africa from the Sahel to South Africa. Strongly associated with soda and saline lakes in East Africa's Rift Valley. Nomadic.
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
Cape Teal
Female gives a soft, nasal quacking series; male produces a high, piping whistle. The male's clear, piping call is unexpected for a teal; heard on Cape and Namibian estuaries.
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.
Geographic Range & Migration
Cape Teal
Breeds across the Palearctic; winters on coasts from western Africa around to Southeast Asia and Australia.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
保护状况
Cape Teal
Brent Goose
How to Tell Them Apart
Cape Teal
Pale gray-brown plumage with fine dark spotting on breast. Pink bill with dark ridge. Iridescent green-and-black speculum with white borders. Pale head. Sexes similar. African saline and alkaline lake specialist.
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.
About These Birds
Cape Teal
开普鸭（Anas capensis）是一种小型浅灰色鸭，喙粉色，眼睛橙红色，具绿色翼镜。是非洲体色最浅的鸭种。属鸭科（Anatidae），分布于撒哈拉以南非洲湿地，广泛分布但数量不多。
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。