Wandering Whistling-duck vs Black Scoter
Dendrocygna arcuata 对比 Melanitta americana
Side-by-Side Comparison
| 属性 | Wandering Whistling-duck | Black Scoter |
|---|---|---|
| 学名 | Dendrocygna arcuata | Melanitta americana |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Near Threatened |
| 体长 | — | — |
| 翼展 | 37.2 cm (14.6 in) | 44.0 cm (17.3 in) |
| 体重 | 779.5 g (27.50 oz) | 1046.1 g (36.90 oz) |
| 食性 | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dives for molluscs, particularly mussels and clams, in coastal waters. Takes aquatic insects and plant … |
| 产卵数 | 6-15 | 5-11 |
| 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.
Black Scoter
Male produces a low, melodious whistle; female gives a harsh, grating call. Closely related to Common Scoter; voice very similar; heard on North American Pacific and Atlantic coasts in winter.
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.
Black Scoter
Breeds in boreal forests and tundra of Alaska and northern Canada. Winters along Pacific and Atlantic coasts south to Baja California and Florida.
保护状况
Wandering Whistling-duck
Black Scoter
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.
Black Scoter
Male is pure glossy black throughout with a prominent bright orange-yellow knob at bill base. Female is dark sooty-brown with pale buff cheeks and foreneck contrasting with darker cap and …
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。
Black Scoter
美洲黑海番鸭是北美的黑色海鸭，雄鸟全身黑色，嘴部具橙黄色斑块；雌鸟褐色，脸颊浅色。繁殖于阿拉斯加和加拿大北部湖泊，越冬于北太平洋和北大西洋沿岸。善深潜，主要以贻贝等软体动物为食。近年来北太平洋种群数量有所下降。