Black-headed Duck vs Masked Duck
Heteronetta atricapilla 比較対象 Nomonyx dominicus
Side-by-Side Comparison
| 属性 | Black-headed Duck | Masked Duck |
|---|---|---|
| 学名 | Heteronetta atricapilla | Nomonyx dominicus |
| 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) | 27.6 cm (10.9 in) |
| 体重 | 528.5 g (18.64 oz) | 361.0 g (12.73 oz) |
| 食性 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dives and dabbles for aquatic seeds, plant matter, and invertebrates in freshwater marshes and ponds … |
| 一腹卵数 | 2 | 4-6 |
| 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.
Masked Duck
Male emits a soft, dove-like cooing note; female gives a harsh, emphatic quack. The male's gentle, almost melodic cooing is surprising for a stiff-tail; heard in tropical American 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.
Masked Duck
Resident from Mexico and the Caribbean south through Central America to northern South America. Found in lowland freshwater marshes and lagoons.
保全状況
Black-headed Duck
Masked 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.
Masked Duck
Male is rich rufous-chestnut with black mask from forehead to face, boldly spotted black on upperparts; blue bill. Female is streaked buff and brown with two dark facial stripes crossing …
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。
Masked Duck
マスクドダックは中南米に分布するカモです。雄は黒い顔の模様と青い嘴が特徴的で、尾を立てる習性があります。深い葦原に覆われた湿地に隠れるように生活し、観察が難しいです。水草の種子や無脊椎動物を採食します。