Swan Goose vs Spotted Whistling-duck
Anser cygnoid ile kıyaslandığında Dendrocygna guttata
Side-by-Side Comparison
| Özellik | Swan Goose | Spotted Whistling-duck |
|---|---|---|
| Bilimsel Ad | Anser cygnoid | Dendrocygna guttata |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Endangered | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 84,4 cm (33.2 in) | 41,3 cm (16.3 in) |
| Ağırlık | 3343,75 g (117.95 oz) | 677,5 g (23.90 oz) |
| Beslenme | 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 … |
| Kuluçka Büyüklüğü | 4-8 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
Swan Goose only
Hiçbiri
Spotted Whistling-duck only
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.
Koruma Durumu
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
A large long-necked goose with warm brown body, pale underparts, a dark brown cap, and a long straight black bill. The ancestor of the Chinese domestic Swan Goose breed. Wild populations are declining sharply. Breeds in Mongolia and Siberia; winters in eastern China. Endangered in the wild.
Spotted Whistling-duck
A small dark brown whistling-duck with bold white spots on its flanks, orange-red bill and legs, and a pale face. Found in tropical wetlands of New Guinea, the Philippines, and Indonesia. Often found near freshwater streams and flooded grassland. Less gregarious than other whistling-ducks.