Wandering Whistling-duck vs Lesser Whistling-duck
Dendrocygna arcuata 比較対象 Dendrocygna javanica
Side-by-Side Comparison
| 属性 | Wandering Whistling-duck | Lesser Whistling-duck |
|---|---|---|
| 学名 | Dendrocygna arcuata | Dendrocygna javanica |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 37.2 cm (14.6 in) | 38.8 cm (15.3 in) |
| 体重 | 779.5 g (27.50 oz) | 525.0 g (18.52 oz) |
| 食性 | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Grazes subarctic grasses and rushes; migratory; winters on estuarine mudflats and coastal grasslands eating eelgrass … |
| 一腹卵数 | 6-15 | 7-17 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Wandering Whistling-duck only
None
Lesser Whistling-duck only
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
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
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
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.
Geographic Range & Migration
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
Lesser Whistling-duck
Breeds on tundra of northern Canada and Alaska; winters on the Pacific coast from California to Mexico and Central America.
保全状況
Wandering Whistling-duck
Lesser Whistling-duck
How to Tell Them Apart
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. Sexes similar.
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.
About These Birds
Wandering Whistling-duck
ワンデリングウィスリングダックは東南アジアからオーストラリアにかけて分布するツリーダックです。栗色の羽毛と長い首が特徴で、群れで移動します。湿地、稲田、水草に覆われた湖に生息し、水草、種子、藻類を採食します。
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。