Lesser Whistling-duck vs Black-headed Duck
Dendrocygna javanica 比較対象 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | Lesser Whistling-duck | Black-headed Duck |
|---|---|---|
| 学名 | Dendrocygna javanica | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 38.8 cm (15.3 in) | 34.7 cm (13.7 in) |
| 体重 | 525.0 g (18.52 oz) | 528.5 g (18.64 oz) |
| 食性 | Grazes subarctic grasses and rushes; migratory; winters on estuarine mudflats and coastal grasslands eating eelgrass … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 一腹卵数 | 7-17 | 2 |
| Population Trend | — | — |
Habitat Comparison
Lesser Whistling-duck
Freshwater wetlands, lakes, rice paddies, mangroves, and slow rivers across South and Southeast Asia from India through southern China to Borneo and Indonesia. Common near cultivated land and human settlements.
Song & Call Comparison
Lesser Whistling-duck
A softer, higher-pitched whistle than other Dendrocygna. Call is a quick 'we-we' given in flight. Smaller size reflected in higher-pitched and thinner quality of call.
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
Lesser Whistling-duck
Breeds on tundra of northern Canada and Alaska; winters on the Pacific coast from California to Mexico and Central America.
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.
保全状況
Lesser Whistling-duck
Black-headed Duck
How to Tell Them Apart
Lesser Whistling-duck
Warm chestnut-brown overall; head and neck brown; upperparts dark brown. Chestnut rump and upper-tail conspicuous in flight. Flanks chestnut with pale streaks. Bill and legs dark gray. Sexes similar.
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
Lesser Whistling-duck
レッサーウィスリングダックは南アジアから東南アジアにかけて分布するツリーダックです。褐色の羽毛と特徴的な鳴き声を持ちます。稲田、湿地、マングローブ林に生息し、水草の種子や葉を採食します。アジアで最もよく見られるツリーダックです。
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。