Black-headed Duck vs Blue-winged Teal
Heteronetta atricapilla 对比 Spatula discors
Side-by-Side Comparison
| 属性 | Black-headed Duck | Blue-winged Teal |
|---|---|---|
| 学名 | Heteronetta atricapilla | Spatula discors |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 34.7 cm (13.7 in) | 35.7 cm (14.1 in) |
| 体重 | 528.5 g (18.64 oz) | 400.5 g (14.13 oz) |
| 食性 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dabbles for aquatic invertebrates and seeds; diet shifts between plant-heavy and invertebrate-heavy phases seasonally. |
| 产卵数 | 2 | 6-15 |
| Population Trend | — | — |
Habitat Comparison
Blue-winged Teal
Breeds on prairie wetlands, lakes, and marshes across North America. Winters on freshwater and coastal wetlands from the southern United States through Central America to South America.
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.
Blue-winged Teal
Male gives a high, thin whistle; female produces a rapid, descending quacking laugh. The nasal, laughing female call is immediately recognizable in North American freshwater marshes.
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.
Blue-winged Teal
Breeds in tundra of northern Russia and Alaska; winters on the open North Pacific from Alaska to Japan and California.
保护状况
Black-headed Duck
Blue-winged Teal
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.
Blue-winged Teal
Males have slate-blue head with bold white crescent before eye. Body brown with dark spots. Pale blue forewing patch and green speculum conspicuous. Females mottled brown with pale loral spot. …
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。
Blue-winged Teal
蓝翅鸭是北美常见的小型水面鸭，以飞行时翼肩的天蓝色斑块和绿色翼镜著称。繁殖于北美大平原和北部湿地，越冬于美国南部、中美洲至南美洲北部，是迁徙距离较长的北美鸭类之一。雄鸟头部蓝灰色，脸颊有白色新月形斑；雌鸟褐色。以水草、种子和水生昆虫为食。