Tundra Bean Goose vs Black-headed Duck
Anser serrirostris comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Tundra Bean Goose | Black-headed Duck |
|---|---|---|
| Nombre científico | Anser serrirostris | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Not Evaluated | Least Concern |
| Longitud | — | — |
| Envergadura | — | 34,7 cm (13.7 in) |
| Peso | 2540,0 g (89.60 oz) | 528,5 g (18.64 oz) |
| Dieta | Eats grasses, seeds, and aquatic plants; dabbles for invertebrates; diet shifts between plant material and … | 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
Tundra Bean Goose only
Black-headed Duck only
Tundra Bean Goose
Breeds on Arctic and subarctic tundra in Siberia. Winters on agricultural land, river floodplains, and wetlands in eastern China, Japan, and Korea, with some wintering in western Europe.
Song & Call Comparison
Tundra Bean Goose
A nasal, lower call compared to Taiga Bean Goose. Considered subspecifically or specifically distinct; vocalizations are an active taxonomic tool for separation in mixed flocks.
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
Tundra Bean Goose
Breeds in northern prairie regions of North America; winters in the southern United States and along both coasts to Mexico.
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
Tundra Bean Goose
Black-headed Duck
How to Tell Them Apart
Tundra Bean Goose
Dark brown head and neck; grayish-brown back with pale feather fringing. Underparts pale gray-brown. Orange-yellow legs. Bill black with orange subterminal band. Recently split from Taiga Bean Goose.
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
Tundra Bean Goose
A large brown goose with dark head and neck, orange-patterned black bill, and orange legs. Separated from Taiga Bean Goose as a distinct species. Breeds on Arctic and subarctic tundra; winters in eastern Asia and occasionally western Europe. More common in Japan and eastern China.
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.