Wandering Whistling-duck vs Brazilian Merganser
Dendrocygna arcuata comparado con Mergus octosetaceus
Side-by-Side Comparison
| Atributo | Wandering Whistling-duck | Brazilian Merganser |
|---|---|---|
| Nombre científico | Dendrocygna arcuata | Mergus octosetaceus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 37,2 cm (14.6 in) | 39,2 cm (15.4 in) |
| Peso | 779,5 g (27.50 oz) | 827,6666666666666 g (29.20 oz) |
| Dieta | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| Tamaño de la puesta | 6-15 | 5-8 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Wandering Whistling-duck only
Ninguno
Brazilian Merganser only
Ninguno
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
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.
Brazilian Merganser
Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.
Geographic Range & Migration
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
Estado de conservación
Wandering Whistling-duck
Brazilian Merganser
How to Tell Them Apart
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.
Brazilian Merganser
Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.
About These Birds
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.
Brazilian Merganser
El merganso brasileño es uno de los patos más amenazados del mundo, con menos de 250 individuos maduros que subsisten en ríos rápidos y limpios del interior del Brasil, con pequeñas poblaciones en Argentina y Paraguay. Tiene plumaje negro con los flancos rojizos en el macho. La deforestación, la contaminación y los proyectos hidroeléctricos han destruido gran parte de su hábitat.