Andaman Teal vs American Black Duck
Anas albogularis 对比 Anas rubripes
Side-by-Side Comparison
| 属性 | Andaman Teal | American Black Duck |
|---|---|---|
| 学名 | Anas albogularis | Anas rubripes |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Near Threatened | Least Concern |
| 体长 | — | — |
| 翼展 | 37.4 cm (14.7 in) | 53.4 cm (21.0 in) |
| 体重 | 370.0 g (13.05 oz) | 1211.25 g (42.73 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates by diving; diet dominated by hard-shelled benthic invertebrates. | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … |
| 产卵数 | 7-8 | 1-17 |
| Population Trend | — | — |
Habitat Comparison
Andaman Teal
Freshwater pools, rice paddies, coastal marshes, and mangrove-fringed inlets on the Andaman and Nicobar Islands, Bay of Bengal. Non-migratory; restricted entirely to this island group.
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Song & Call Comparison
Andaman Teal
Female produces a soft, descending quacking series; male gives a subdued whistle. Low-pitched, unobtrusive calls rarely heard; this Near Threatened island teal is generally quiet.
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Geographic Range & Migration
Andaman Teal
Breeds in boreal forest wetlands of central Canada; winters along the Atlantic coast from New England to the Caribbean.
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
保护状况
Andaman Teal
American Black Duck
How to Tell Them Apart
Andaman Teal
Dark brown mottled plumage; pale throat and face contrasting with dark crown. Iridescent green speculum. Bill gray; legs grayish. Sexes similar. Endemic to Andaman Islands; near-threatened island population.
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
About These Birds
Andaman Teal
白喉鸭（Anas albogularis）是一种小型深褐色鸭，喉部和颏部白色，具绿色翼镜，嘴深色。特产于印度安达曼群岛，属鸭科（Anatidae），是该群岛的特有种，种群数量较少。
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.