Black-headed Duck vs White-headed Duck
Heteronetta atricapilla 对比 Oxyura leucocephala
Side-by-Side Comparison
| 属性 | Black-headed Duck | White-headed Duck |
|---|---|---|
| 学名 | Heteronetta atricapilla | Oxyura leucocephala |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Endangered |
| 体长 | — | — |
| 翼展 | 34.7 cm (13.7 in) | 29.7 cm (11.7 in) |
| 体重 | 528.5 g (18.64 oz) | 705.0 g (24.87 oz) |
| 食性 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dives for aquatic invertebrates, seeds, and plant roots in Mediterranean and Central Asian wetlands. Critically … |
| 产卵数 | 2 | 3-10 |
| 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.
White-headed Duck
Male produces a mechanical, rapid bill-drumming; female gives a harsh, grating quack. The drumming staccato display is the same pattern as other Oxyura stiff-tails; heard on Eurasian steppe 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.
White-headed Duck
Breeds in Spain, Turkey, central Asia, and Mongolia. Winters in the Mediterranean, the Middle East, and northern India. Globally endangered.
保护状况
Black-headed Duck
White-headed 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.
White-headed Duck
Male has entirely white head with small black crown patch, rich chestnut-brown body, and large bulbous powder-blue bill. Female is brown with pale whitish face divided by dark streak across …
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。
White-headed Duck
白头硬尾鸭是地中海地区濒危的小型硬尾鸭，雄鸟白色大头、蓝色嘴和竖起的黑色尾羽极具特色；雌鸟褐色，脸颊有深色横纹。繁殖于西班牙、北非、土耳其和中亚，由于湿地破坏、猎捕和与北美草原硬尾鸭的杂交竞争，被列为濒危物种，全球数量估计不足1万只。