Spotted Whistling-duck vs Scaly-sided Merganser
Dendrocygna guttata 对比 Mergus squamatus
Side-by-Side Comparison
| 属性 | Spotted Whistling-duck | Scaly-sided Merganser |
|---|---|---|
| 学名 | Dendrocygna guttata | Mergus squamatus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Endangered |
| 体长 | — | — |
| 翼展 | 41.3 cm (16.3 in) | 51.2 cm (20.2 in) |
| 体重 | 677.5 g (23.90 oz) | 1145.8 g (40.42 oz) |
| 食性 | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for fish in fast-flowing East Asian rivers. Endangered; highly piscivorous with serrated bill adapted … |
| 产卵数 | 10-11 | 4-14 |
| Population Trend | — | — |
Habitat Comparison
共同栖息地
Spotted Whistling-duck only
Scaly-sided Merganser only
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.
Scaly-sided Merganser
Male gives a quiet, low grunting call; female produces a guttural, croaking series. Endangered; calls are poorly known; similar to Red-breasted Merganser but quieter in Manchurian forest rivers.
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.
Scaly-sided Merganser
Breeds in southern Russia, northern China, and the Russian Far East. Winters in southern China and Korea. Found on fast-flowing forested rivers.
保护状况
Spotted Whistling-duck
Scaly-sided Merganser
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.
Scaly-sided Merganser
Male has iridescent dark green head with long flat crest, white body with distinctive black scaly pattern on flanks, and black back with white patches. Female has brownish-red crested head …
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。
Scaly-sided Merganser
中华秋沙鸭是东亚特有的濒危秋沙鸭，繁殖于中国东北和俄罗斯远东地区，越冬于中国中南部和朝鲜半岛。雄鸟头部深绿色有冠羽，体侧具黑色鳞状斑纹，腿橙色。由于森林砍伐、河流污染和猎捕，被列为濒危物种，估计野生数量约1000至2500只。