Tundra Bean Goose vs Black-headed Duck
Anser serrirostris 对比 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | Tundra Bean Goose | Black-headed Duck |
|---|---|---|
| 学名 | Anser serrirostris | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Not Evaluated | Least Concern |
| 体长 | — | — |
| 翼展 | — | 34.7 cm (13.7 in) |
| 体重 | 2540.0 g (89.60 oz) | 528.5 g (18.64 oz) |
| 食性 | Eats grasses, seeds, and aquatic plants; dabbles for invertebrates; diet shifts between plant material and … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 产卵数 | 3-8 | 2 |
| Population Trend | — | — |
Habitat Comparison
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
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.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
Tundra Bean Goose
Breeds in northern prairie regions of North America; winters in the southern United States and along both coasts to Mexico.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
保护状况
Tundra Bean Goose
Black-headed Duck
How to Tell Them Apart
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.
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
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。
Black-headed Duck
黑头鸭是南美洲的寄生性鸭子，不自己筑巢，而将卵产于其他水鸟（包括其他鸭类、䴙䴘、红鹭等）的巢中，由寄主孵化并抚育。分布于阿根廷、乌拉圭、智利和巴西南部。雄鸟头部黑色，体羽深褐色；雌鸟头部褐色。是唯一真正的全职巢寄生鸭类。