Hawaiian Goose vs Spotted Whistling-duck
Branta sandvicensis comparado com Dendrocygna guttata
Side-by-Side Comparison
| Atributo | Hawaiian Goose | Spotted Whistling-duck |
|---|---|---|
| Nome científico | Branta sandvicensis | Dendrocygna guttata |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Near Threatened | Least Concern |
| Comprimento | — | — |
| Envergadura | 72,8 cm (28.7 in) | 41,3 cm (16.3 in) |
| Peso | 2150,0 g (75.84 oz) | 677,5 g (23.90 oz) |
| Dieta | Eats aquatic plants, algae, and grasses; upends in shallow water to graze submerged vegetation; diet … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| Tamanho da postura | 1-6 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Hawaiian Goose only
Nenhum
Spotted Whistling-duck only
Hawaiian Goose
Volcanic slopes, lava flows, coastal grasslands, and shrublands on Maui, Hawai'i, and Kauai. Adapted to rocky terrain with reduced toe webbing. Introduced to other Hawaiian islands. Avoids dense forest.
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
Hawaiian Goose
A soft, low 'moo-moo' — the murmuring call gives the Nene its Hawaiian name. Also gives honking calls in flight. Less vocal than Canada Goose; distinctive murmuring quality.
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
Hawaiian Goose
Breeds in sub-Arctic Canada; winters on large lakes and rivers from the Gulf of Mexico north to where water remains open.
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
Hawaiian Goose
Spotted Whistling-duck
How to Tell Them Apart
Hawaiian Goose
Buff-tan neck with black and white channeled furrows. Crown and face black; hindneck black. Body gray-brown above; underparts pale with buff breast. Reduced webbing on feet. Sexes similar. State bird …
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
Hawaiian Goose
O ganso-do-havaí, ou nēnē, é o ganso endémico do Havaí e a ave nacional do estado. Quase foi extinto no século XX, com apenas 30 aves remanescentes nos anos 1950. Graças a programas de criação em cativeiro intensivos e reintroduções, as populações cresceram para vários milhares. Ao contrário de outros gansos, está adaptado a andar em terreno vulcânico com patas parcialmente dessensoradas. Habita encostas vulcânicas e pastagens do Havaí e outras ilhas.
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.