Baer's Pochard vs Spotted Whistling-duck
Aythya baeri comparado com Dendrocygna guttata
Side-by-Side Comparison
| Atributo | Baer's Pochard | Spotted Whistling-duck |
|---|---|---|
| Nome científico | Aythya baeri | Dendrocygna guttata |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Critically Endangered | Least Concern |
| Comprimento | — | — |
| Envergadura | 40,4 cm (15.9 in) | 41,3 cm (16.3 in) |
| Peso | 707,25 g (24.95 oz) | 677,5 g (23.90 oz) |
| Dieta | Dives for molluscs and aquatic invertebrates; diet dominated by hard-shelled benthic prey in coastal shallow-water … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| Tamanho da postura | 6-13 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Baer's Pochard only
Nenhum
Spotted Whistling-duck only
Baer's Pochard
Breeds on lakes and rivers in boreal forests of eastern Siberia and northeastern China. Winters on freshwater lakes and wetlands in eastern and southeastern Asia. Critically Endangered; tiny remaining population.
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
Baer's Pochard
Male gives a low, grating wheeze; female produces a harsh quacking series. Calls resemble Tufted Duck but slightly softer; among the rarest duck calls in East Asia due to its …
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
Baer's Pochard
Breeds in Arctic Canada and Alaska; winters at sea off both US coasts and in the Great Lakes during migration.
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
Baer's Pochard
Spotted Whistling-duck
How to Tell Them Apart
Baer's Pochard
Males have dark glossy greenish-black head; chestnut breast; white flanks and undertail. White eye. Females brown with chestnut breast and pale face patch. White wing stripe in flight. Critically endangered …
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
Baer's Pochard
O pato de Baer é um pato mergulhador criticamente ameaçado nativo do nordeste da China e adjacente Rússia. Os machos têm cabeça e pescoço verdes com olhos brancos característicos. Cria em zonas húmidas de floresta inundada e hiberna no Sul e Sudeste da Ásia. As populações colapsaram nos últimos anos de números anteriores de milhares para apenas centenas, tornando-o um dos patos mais em perigo do mundo. As causas incluem caça, perda de habitat e perturbação.
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.