White-winged Duck vs Black-headed Duck
Asarcornis scutulata comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | White-winged Duck | Black-headed Duck |
|---|---|---|
| Nombre científico | Asarcornis scutulata | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Critically Endangered | Least Concern |
| Longitud | — | — |
| Envergadura | 68,3 cm (26.9 in) | 34,7 cm (13.7 in) |
| Peso | 2950,0 g (104.06 oz) | 528,5 g (18.64 oz) |
| Dieta | Feeds on seeds, plant material, and aquatic invertebrates; dabbles in shallow water; diet varies widely … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 6-15 | 2 |
| Population Trend | — | — |
Habitat Comparison
White-winged Duck
Undisturbed lowland tropical forest near slow rivers, pools, and forest swamps at low elevations in northeastern India, Bangladesh, Myanmar, and Sumatra. Requires large trees with nest cavities near permanent water.
Song & Call Comparison
White-winged Duck
Critically endangered; extremely rare in wild. Gives low guttural hissing calls and soft wing-beating sounds. Vocalizations in wild scarcely documented given its rarity.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
White-winged Duck
Breeds in northern Eurasia; winters in sub-Saharan Africa. A classic Palearctic–African migrant with a wide wintering range.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
Estado de conservación
White-winged Duck
Black-headed Duck
How to Tell Them Apart
White-winged Duck
Dark brown body with pale spotting on head and neck. Bold white wing patch visible in flight. Yellowish-orange bill; legs orange. Head pale buffish-white speckled brown. Critically endangered SE Asian …
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
White-winged Duck
El pato blanquibronceado o pato silvestre es una especie en peligro de extinción del sur y el sudeste de Asia. Tiene el plumaje negro brillante con la cabeza y el cuello de color blanco en el macho. Habita en densos bosques tropicales con ríos, lagunas y pantanos en India, Bangladés, Myánmar, Laos, Tailandia, Vietnam e Indonesia. La deforestación lo ha reducido a pequeñas poblaciones.
Black-headed Duck
El pato cabeza negra es un pequeño pato buceador (~530 g) de América del Sur, familia Anatidae, y el único miembro del género Heteronetta. Tiene la cabeza negra en el macho y cuerpo marrón. Parásita de nido obligada: pone sus huevos en los nidos de otras aves acuáticas, especialmente fochas y pollas de agua. Habita en lagos y lagunas con vegetación emergente de Argentina, Bolivia, Brasil, Chile, Paraguay y Uruguay. No cría su propia cría nunca.