American Black Duck vs Tundra Bean Goose
Anas rubripes 对比 Anser serrirostris
Side-by-Side Comparison
| 属性 | American Black Duck | Tundra Bean Goose |
|---|---|---|
| 学名 | Anas rubripes | Anser serrirostris |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Not Evaluated |
| 体长 | — | — |
| 翼展 | 53.4 cm (21.0 in) | — |
| 体重 | 1211.25 g (42.73 oz) | 2540.0 g (89.60 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-17 | 3-8 |
| Population Trend | — | — |
Habitat Comparison
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.
Tundra Bean Goose
Breeds on Arctic and subarctic tundra in Siberia. Winters on agricultural land, river floodplains, and wetlands in eastern China, Japan, and Korea, with some wintering in western Europe.
Song & Call Comparison
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.
Tundra Bean Goose
A nasal, lower call compared to Taiga Bean Goose. Considered subspecifically or specifically distinct; vocalizations are an active taxonomic tool for separation in mixed flocks.
保护状况
American Black Duck
Tundra Bean Goose
How to Tell Them Apart
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 …
Tundra Bean Goose
Dark brown head and neck; grayish-brown back with pale feather fringing. Underparts pale gray-brown. Orange-yellow legs. Bill black with orange subterminal band. Recently split from Taiga Bean Goose.
About These Birds
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.
Tundra Bean Goose
短嘴豆雁原为豆雁的一个亚种，近年被提升为独立物种。繁殖于西伯利亚东北部苔原，越冬于日本、朝鲜半岛及中国东部沿海。外形与豆雁相似，但体型略小，嘴更短厚，以苔原植物和越冬地农田为食。