Bar-headed Goose vs Spotted Whistling-duck
Anser indicus comparado com Dendrocygna guttata
Side-by-Side Comparison
| Atributo | Bar-headed Goose | Spotted Whistling-duck |
|---|---|---|
| Nome científico | Anser indicus | Dendrocygna guttata |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 87,6 cm (34.5 in) | 41,3 cm (16.3 in) |
| Peso | 2288,0 g (80.71 oz) | 677,5 g (23.90 oz) |
| Dieta | Eats aquatic plants, grasses, and roots; filters invertebrates during breeding; forms large flocks on shallow … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| Tamanho da postura | 3-8 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Bar-headed Goose only
Nenhum
Spotted Whistling-duck only
Nenhum
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.
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
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.
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.
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.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
Estado de conservação
Bar-headed Goose
Spotted Whistling-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.
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.
About These Birds
Bar-headed Goose
O ganso-de-cabeça-listrada é famoso pelas suas extraordinárias migrações de alta altitude sobre o Himalaia, atingindo elevações de mais de 7.000 metros. É facilmente identificado pelas duas listras pretas características na cabeça branca. Cria em lagos de alta altitude no Tibete, Mongólia e países adjacentes. Hiberna nas planícies do subcontinente indiano. Tem fisiologia especialmente adaptada para respirar em altitudes extremas com hemoglobina que tem maior afinidade pelo oxigénio.
Spotted Whistling-duck
O parreco-pintalgado é um pato assobiadeiro grande encontrado nas Filipinas, Indonésia e Papua Nova Guiné. Distingue-se pelos seus flancos e cobertura da cauda largamente com pintas brancas num fundo escuro. Tem pescoço escuro, coroa castanha e bico e pernas cinzentos. Habita zonas húmidas tropicais de baixa altitude, lagos e arrozais. Tem uma distribuição fragmentada e é classificado como quase ameaçado em algumas regiões.