Swan Goose vs Spotted Whistling-duck
Anser cygnoid comparado con Dendrocygna guttata
Side-by-Side Comparison
| Atributo | Swan Goose | Spotted Whistling-duck |
|---|---|---|
| Nombre científico | Anser cygnoid | Dendrocygna guttata |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Endangered | Least Concern |
| Longitud | — | — |
| Envergadura | 84,4 cm (33.2 in) | 41,3 cm (16.3 in) |
| Peso | 3343,75 g (117.95 oz) | 677,5 g (23.90 oz) |
| Dieta | 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 … |
| Tamaño de la puesta | 4-8 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Swan Goose only
Ninguno
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.
Estado de conservación
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
El ganso cisne es un gran ganso asiático con el cuello largo y esbelto y un llamativo pico largo y negro con un prominente nódulo en la base. Es el antecesor del ganso doméstico chino. Cría en la estepa y el semidesierto de Asia central y Mongolia y migra al este de China para pasar el invierno. Su población ha disminuido por la degradación del hábitat y la caza.
Spotted Whistling-duck
El pato silbador moteado es un pato silbador de Indonesia, Filipinas y Nueva Guinea, fácilmente reconocible por el plumaje marrón oscuro con manchas blancas en los flancos. Habita en bosques húmedos tropicales con estanques, pantanos y arrozales. Como todos los patos silbadores, tiene un llamado silbante característico y postura erguida. Está clasificado como casi amenazado.