Bar-headed Goose vs Black-headed Duck
Anser indicus comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Bar-headed Goose | Black-headed Duck |
|---|---|---|
| Nombre científico | Anser indicus | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 87,6 cm (34.5 in) | 34,7 cm (13.7 in) |
| Peso | 2288,0 g (80.71 oz) | 528,5 g (18.64 oz) |
| Dieta | Eats aquatic plants, grasses, and roots; filters invertebrates during breeding; forms large flocks on shallow … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 3-8 | 2 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Bar-headed Goose only
Black-headed Duck only
Ninguno
Bar-headed Goose
Breeds on high-altitude lakes and rivers at 4,000–5,000 m in Central Asia (Tibet, Mongolia, Ladakh). Migrates over the Himalayas. Winters on rivers, lakes, and agricultural fields in the Indian subcontinent.
Song & Call Comparison
Bar-headed Goose
A nasal, goose-like honking 'wang-wang-wang'. Flocks give persistent calling during high-altitude Himalayan migration — among the highest migrations of any bird species.
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
Bar-headed Goose
Breeds in high Arctic of Greenland, Canada, and Alaska; winters on rocky coasts of eastern North America and western Europe.
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
Bar-headed Goose
Black-headed Duck
How to Tell Them Apart
Bar-headed Goose
White head with two distinctive black bars across crown. Yellow-orange bill and legs. Back and wings pale gray; underparts white. Black-tipped primaries. Sexes similar; famed for Himalayan migration.
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
Bar-headed Goose
El ganso índico o ganso de las barras es famoso por ser el ave con vuelos documentados a mayor altitud, habiendo sido observado cruzando el Himalaya a alturas superiores a 7.000 metros. Tiene el plumaje gris claro con la cabeza blanca y dos barras negras en la coronilla. Cría en el Tíbet y Asia central y migra al sur de Asia para pasar el invierno.
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.