African Black Duck vs Brazilian Merganser
Anas sparsa comparado con Mergus octosetaceus
Side-by-Side Comparison
| Atributo | African Black Duck | Brazilian Merganser |
|---|---|---|
| Nombre científico | Anas sparsa | Mergus octosetaceus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 49,5 cm (19.5 in) | 39,2 cm (15.4 in) |
| Peso | 996,8333333333334 g (35.16 oz) | 827,6666666666666 g (29.20 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| Tamaño de la puesta | 4-9 | 5-8 |
| Population Trend | — | — |
Habitat Comparison
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Song & Call Comparison
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
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
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
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
African Black Duck
Brazilian Merganser
How to Tell Them Apart
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
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
African Black Duck
El pato africano moteado es un pato de tamaño mediano de color marrón oscuro con motas blancas en el pecho y los flancos. Habita en ríos de rápido caudal, cascadas y arroyos de montaña en África central y meridional, siendo inusual entre los patos por su preferencia por aguas corrientes y turbulentas. También se encuentra en altitudes elevadas en las zonas montañosas de África oriental.
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.