Wandering Whistling-duck vs Ruddy Duck
Dendrocygna arcuata 对比 Oxyura jamaicensis
Side-by-Side Comparison
| 属性 | Wandering Whistling-duck | Ruddy Duck |
|---|---|---|
| 学名 | Dendrocygna arcuata | Oxyura jamaicensis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 37.2 cm (14.6 in) | 27.9 cm (11.0 in) |
| 体重 | 779.5 g (27.50 oz) | 586.6666666666666 g (20.69 oz) |
| 食性 | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dives for aquatic plant seeds, roots, and invertebrates in freshwater marshes. Uses stiff tail as … |
| 产卵数 | 6-15 | 5-15 |
| Population Trend | — | — |
Habitat Comparison
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.
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.
Ruddy Duck
Male produces a mechanical, drumming bok-bok-bok staccato beat; female gives a harsh, nasal quack. The male's rapid drum-roll call on the bill during display is startlingly loud and distinctive.
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.
Ruddy Duck
Breeds across interior North America from western Canada south to Mexico. Winters on coasts and inland waters south to northern South America.
保护状况
Wandering Whistling-duck
Ruddy 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.
Ruddy Duck
Breeding male has vivid rufous-chestnut body, black crown, white cheeks, and bright sky-blue bill; stiff tail often cocked upright. Female is dull brown with pale cheek crossed by single dark …
About These Birds
Wandering Whistling-duck
流苏树鸭分布于东南亚至澳大利亚北部的热带地区，包括印度尼西亚、菲律宾和新几内亚。以翼上具浅色流苏状羽毛为特征。体羽褐色，具栗褐色和白色斑纹。栖息于热带淡水湖泊和沼泽，以水生植物和无脊椎动物为食，常在水中觅食，也在树洞中营巢。
Ruddy Duck
北美草原硬尾鸭以雄鸟繁殖季蓝色的嘴巴和高举的刚硬尾羽为特征。繁殖于北美大平原，越冬于美国南部和中美洲。雌鸟褐色，脸颊有深色条纹。以水生植物、种子和无脊椎动物为食。被引入欧洲后与濒危的白头硬尾鸭杂交，对后者构成严重威胁。