Coscoroba Swan vs Spotted Whistling-duck
Coscoroba coscoroba 对比 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | Coscoroba Swan | Spotted Whistling-duck |
|---|---|---|
| 学名 | Coscoroba coscoroba | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 84.2 cm (33.1 in) | 41.3 cm (16.3 in) |
| 体重 | 4200.0 g (148.15 oz) | 677.5 g (23.90 oz) |
| 食性 | Eats seeds, aquatic plants, and invertebrates; dabbles and upends in shallow water; diet more invertebrate-heavy … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 产卵数 | 4-9 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Coscoroba Swan
Freshwater lakes, marshes, lagoons, and flooded grasslands from southern Brazil through Uruguay, Chile, and Argentina to Tierra del Fuego. Partially migratory; moves northward in winter. Nests in reedy margins.
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
Coscoroba Swan
A bugling, honking 'coscoroba' call — giving the species its onomatopoeic name. Loud and far-carrying. Less commonly heard than northern hemisphere swans.
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.
Geographic Range & Migration
Coscoroba Swan
Breeds in western North American prairies and parklands; winters in California, the Southwest, and northern Mexico.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
保护状况
Coscoroba Swan
Spotted Whistling-duck
How to Tell Them Apart
Coscoroba Swan
Entirely white plumage except black wingtips visible in flight. Bright red bill and red legs and feet. Red eye-ring. More goose-like than true swans. Juvenile has brownish wash. Sexes similar.
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.
About These Birds
Coscoroba Swan
白天鹅雁是南美洲特有的一种白色水鸟，外形介于天鹅和雁之间，为天鹅科中最小的成员。全身白色，嘴和腿部红色，翼尖具黑色羽毛。繁殖于南美洲南部的湖泊和湿地，越冬于巴西和阿根廷北部，以水生植物为食。常在草地和湿地环境中成群活动。
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。