Black-headed Duck vs Hooded Merganser
Heteronetta atricapilla 比較対象 Lophodytes cucullatus
Side-by-Side Comparison
| 属性 | Black-headed Duck | Hooded Merganser |
|---|---|---|
| 学名 | Heteronetta atricapilla | Lophodytes cucullatus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 34.7 cm (13.7 in) | 37.3 cm (14.7 in) |
| 体重 | 528.5 g (18.64 oz) | 638.0 g (22.50 oz) |
| 食性 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dives for small fish, aquatic invertebrates, and frogs in clear freshwater streams and ponds. Uses … |
| 一腹卵数 | 2 | 6-18 |
| 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.
Hooded Merganser
Male produces a low, rolling rolling-tum tumbling call; female gives a harsh, grating quack. The male's frog-like rolling call is unique among North American ducks during winter courtship.
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.
Hooded Merganser
Breeds in forested wetlands of North America from southern Canada to the northern United States. Winters on rivers and lakes south to Mexico.
保全状況
Black-headed Duck
Hooded Merganser
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.
Hooded Merganser
Male has fan-shaped black-and-white erectile crest; black head and neck, white breast with two black bars, rich cinnamon flanks. Female is greyish-brown with rusty-cinnamon crest, paler below.
About These Birds
Black-headed Duck
クロアタマカモはアルゼンチン・チリ・ウルグアイ・ブラジル南部の南アメリカ温帯湖沼・湿地に生息する托卵性のカモ（体長32〜35 cm）。雄は黒い頭と薄い茶色の体が特徴。他のカモ・コオット・ヒクイナの巣に托卵する。育雛しない数少ない水禽の一つ。
Hooded Merganser
フードマーガンサーは北米の森林に繁殖する小型の潜水性カモです。雄の大きな扇形の白い冠羽が最大の特徴で、黒と白の羽毛が美しいです。森林の池や川に生息し、魚、甲殻類、水生昆虫を潜って採食します。木の洞に営巣します。