Spotted Whistling-duck vs Brazilian Merganser
Dendrocygna guttata comparado con Mergus octosetaceus
Side-by-Side Comparison
| Atributo | Spotted Whistling-duck | Brazilian Merganser |
|---|---|---|
| Nombre científico | Dendrocygna guttata | Mergus octosetaceus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 41,3 cm (16.3 in) | 39,2 cm (15.4 in) |
| Peso | 677,5 g (23.90 oz) | 827,6666666666666 g (29.20 oz) |
| Dieta | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| Tamaño de la puesta | 10-11 | 5-8 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Spotted Whistling-duck only
Brazilian Merganser only
Ninguno
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
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.
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
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
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
Spotted Whistling-duck
Brazilian Merganser
How to Tell Them Apart
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.
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
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.
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.