Swan Goose vs Spotted Whistling-duck
Anser cygnoid 对比 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | Swan Goose | Spotted Whistling-duck |
|---|---|---|
| 学名 | Anser cygnoid | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Endangered | Least Concern |
| 体长 | — | — |
| 翼展 | 84.4 cm (33.2 in) | 41.3 cm (16.3 in) |
| 体重 | 3343.75 g (117.95 oz) | 677.5 g (23.90 oz) |
| 食性 | Herbivore; grazes aquatic plants and grasses at wetland margins; takes invertebrates in spring; diet shifts … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 产卵数 | 4-8 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Swan Goose
Breeds on steppe lakes, rivers, and meadows in Mongolia, Siberia, and northeastern China. Winters in eastern China's Yangtze River floodplain and coastal wetlands. Wild populations critically small.
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
Swan Goose
A deep, resonant 'honk'; less frequently heard than Greylag. The EN status reflects serious population decline; vocalizations are considered similar to Greylag Goose.
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
Swan Goose
Breeds in the tundra and boreal zones of Alaska and Canada; winters on the Pacific coast from British Columbia to California.
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
Swan Goose
Spotted Whistling-duck
How to Tell Them Apart
Swan Goose
Long neck with rich chestnut hindneck stripe. Forehead and crown dark brown; face and throat whitish. Upperparts grayish-brown; underparts pale. Long black bill. Pink legs. Ancestor of Chinese domestic geese.
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
Swan Goose
鸿雁是家鹅（中国鹅）的野生祖先，繁殖于西伯利亚东部和中国北部，越冬于中国长江流域和朝鲜半岛。体型大，颈细长，前额有明显的黑色额疣（雄鸟更为突出），背部深褐色，腹部浅色。以水生植物和农作物为食，被列为易危物种。
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。