Spotted Whistling-duck vs Black Scoter
Dendrocygna guttata 对比 Melanitta americana
Side-by-Side Comparison
| 属性 | Spotted Whistling-duck | Black Scoter |
|---|---|---|
| 学名 | Dendrocygna guttata | Melanitta americana |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Near Threatened |
| 体长 | — | — |
| 翼展 | 41.3 cm (16.3 in) | 44.0 cm (17.3 in) |
| 体重 | 677.5 g (23.90 oz) | 1046.1 g (36.90 oz) |
| 食性 | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for molluscs, particularly mussels and clams, in coastal waters. Takes aquatic insects and plant … |
| 产卵数 | 10-11 | 5-11 |
| Population Trend | — | — |
Habitat Comparison
Spotted Whistling-duck
Freshwater wetlands, rice fields, streams, and forest pools in New Guinea, Sulawesi, the Philippines, and Moluccas. Often found near forested rivers and seasonal swamps at low elevations.
Song & Call Comparison
Spotted Whistling-duck
A musical, high whistle similar to other whistling-ducks. Call is softer and less far-carrying than White-faced or Black-bellied species. Given in flight and on water.
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
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
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
Spotted Whistling-duck
Black Scoter
How to Tell Them Apart
Spotted Whistling-duck
Dark brown above; head and neck dark brown. Underparts heavily spotted white on dark brown ground, giving spotted appearance. Flanks with bold white spots. Pink-red bill and legs. 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
Spotted Whistling-duck
斑树鸭是东南亚和西南太平洋的树鸭，分布于印度尼西亚、菲律宾、巴布亚新几内亚及澳大利亚北部。体羽深褐色，胸部和腹部具白色斑点，嘴灰黑色。栖息于热带雨林的湖泊、河流和湿地，以水生植物、种子和无脊椎动物为食，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。