Hawaiian Goose vs Mallard
Branta sandvicensis comparado com Anas platyrhynchos
Side-by-Side Comparison
| Atributo | Hawaiian Goose | Mallard |
|---|---|---|
| Nome científico | Branta sandvicensis | Anas platyrhynchos |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Near Threatened | Least Concern |
| Comprimento | — | 58,0 cm (22.8 in) |
| Envergadura | 72,8 cm (28.7 in) | 90,0 cm (35.4 in) |
| Peso | 2150,0 g (75.84 oz) | 1100,0 g (38.80 oz) |
| Dieta | -- | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| Tamanho da postura | 1-6 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
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.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Hawaiian Goose
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Estado de conservação
Hawaiian Goose
Mallard
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 …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
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.
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.