Swan Goose vs Wandering Whistling-duck
Anser cygnoid comparado con Dendrocygna arcuata
Side-by-Side Comparison
| Atributo | Swan Goose | Wandering Whistling-duck |
|---|---|---|
| Nombre científico | Anser cygnoid | Dendrocygna arcuata |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Endangered | Least Concern |
| Longitud | — | — |
| Envergadura | 84,4 cm (33.2 in) | 37,2 cm (14.6 in) |
| Peso | 3343,75 g (117.95 oz) | 779,5 g (27.50 oz) |
| Dieta | Herbivore; grazes aquatic plants and grasses at wetland margins; takes invertebrates in spring; diet shifts … | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … |
| Tamaño de la puesta | 4-8 | 6-15 |
| 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.
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
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.
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
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.
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
Estado de conservación
Swan Goose
Wandering 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.
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. 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.
Wandering Whistling-duck
El pato silbador vagabundo es un pato silbador de distribución amplia en las regiones tropicales de Asia y el Pacífico, desde Borneo e Indonesia hasta Nueva Guinea y Australia. Tiene plumaje castaño con blanco y negro en los flancos. Habita en humedales tropicales, pantanos, lagunas, estanques y arrozales. Es una especie nómada que sigue las lluvias en busca de humedales.