Chestnut Teal vs Brent Goose
Anas castanea 对比 Branta bernicla
Side-by-Side Comparison
| 属性 | Chestnut Teal | Brent Goose |
|---|---|---|
| 学名 | Anas castanea | Branta bernicla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 40.4 cm (15.9 in) | 63.9 cm (25.2 in) |
| 体重 | 662.25 g (23.36 oz) | 1335.0 g (47.09 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow water; diet heavier in molluscs in … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| 产卵数 | 5-17 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Chestnut Teal
Coastal and estuarine wetlands, saltmarshes, estuaries, and coastal freshwater lakes in southeastern and southwestern Australia. More closely tied to coastal habitats than most Australian ducks.
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
Chestnut Teal
Female produces a loud, emphatic quacking series; male gives a high, whistled note. The female's resonant quacking call is a familiar sound of southern Australian coastal wetlands.
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
Chestnut Teal
Breeds in the north-central prairies; winters along the Atlantic and Gulf coasts of the United States.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
保护状况
Chestnut Teal
Brent Goose
How to Tell Them Apart
Chestnut Teal
Strong dimorphism. Males have iridescent dark green head; rich chestnut underparts with white flank patch. Brown back; dark undertail. Females mottled brown with pale face. Iridescent green speculum. Australian coastal.
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
Chestnut Teal
栗鸭（Anas castanea）是一种小型鸭，雄鸟头部具华丽虹彩绿色，体羽栗色，具绿色翼镜。属鸭科（Anatidae），特产于澳大利亚南部，分布于各类湿地，是澳大利亚最迷人的小型鸭之一。
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。