Black-headed Duck vs Andean Duck
Heteronetta atricapilla 对比 Oxyura ferruginea
Side-by-Side Comparison
| 属性 | Black-headed Duck | Andean Duck |
|---|---|---|
| 学名 | Heteronetta atricapilla | Oxyura ferruginea |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 34.7 cm (13.7 in) | 31.4 cm (12.4 in) |
| 体重 | 528.5 g (18.64 oz) | 800.75 g (28.25 oz) |
| 食性 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dives for aquatic invertebrates and plant seeds in Andean lakes and marshes. Diet similar to … |
| 产卵数 | 2 | 6-10 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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.
Andean Duck
Male gives a rapid, staccato drumming display call; female produces a nasal, quacking rattle. The male's mechanical drumming is similar to Ruddy Duck; echoes across Andean high-altitude lakes.
Geographic Range & Migration
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.
Andean Duck
Resident in the Andes of Colombia, Ecuador, Peru, Bolivia, and northwestern Argentina. Found on high-altitude lakes above 3,000 m.
保护状况
Black-headed Duck
Andean Duck
How to Tell Them Apart
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.
Andean Duck
Male is dark chestnut-rufous overall with black head, white cheeks tinged grey, and deep blue bill. Female is dark brownish with pale cheeks divided by a dark bar; similar to …
About These Birds
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。
Andean Duck
安第斯硬尾鸭（有时作为北美草原硬尾鸭亚种处理）是南美洲安第斯高原特有的小型硬尾鸭。雄鸟头部黑色，嘴部蓝色，体羽棕红色；雌鸟褐色。分布于哥伦比亚至阿根廷的高原湖泊，善深潜，以水生植物和无脊椎动物为食，极少飞行。