White-cheeked Pintail vs Black-headed Duck
Anas bahamensis 对比 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | White-cheeked Pintail | Black-headed Duck |
|---|---|---|
| 学名 | Anas bahamensis | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 41.1 cm (16.2 in) | 34.7 cm (13.7 in) |
| 体重 | 544.5 g (19.21 oz) | 528.5 g (18.64 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal water; diet dominated by hard-shelled … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 产卵数 | 5-12 | 2 |
| Population Trend | — | — |
Habitat Comparison
White-cheeked Pintail
Freshwater, brackish, and coastal wetlands across the Caribbean, Galapagos Islands, and South America from Venezuela south to Argentina. Tolerates saline habitats; common in coastal lagoons and estuaries.
Song & Call Comparison
White-cheeked Pintail
Female gives a descending quacking series; male produces a soft, nasal gak note. Both sexes relatively quiet; calls carry across Caribbean mangroves and Bahamian tidal flats.
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
White-cheeked Pintail
Breeds in the subarctic and Arctic Eurasia; winters across temperate lakes and coasts in Europe, Africa, and Asia.
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
White-cheeked Pintail
Black-headed Duck
How to Tell Them Apart
White-cheeked Pintail
Brown body mottled with dark spots; white cheeks and throat distinctive. Pointed tail. Red base to gray bill. Iridescent green speculum with buff-white front border. Sexes similar but males have …
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
White-cheeked Pintail
白颊针尾鸭（Anas bahamensis）是一种身材修长的鸭，面颊和喉部白色与棕色体羽形成对比，喙基部红色，体羽灰色。属鸭科（Anatidae），分布于加勒比海至南美洲的热带湿地，以及加拉帕戈斯群岛。
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。