Hawaiian Goose vs Mute Swan
Branta sandvicensis comparado com Cygnus olor
Side-by-Side Comparison
| Atributo | Hawaiian Goose | Mute Swan |
|---|---|---|
| Nome científico | Branta sandvicensis | Cygnus olor |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Near Threatened | Least Concern |
| Comprimento | — | 152,0 cm (59.8 in) |
| Envergadura | 72,8 cm (28.7 in) | 235,0 cm (92.5 in) |
| Peso | 2150,0 g (75.84 oz) | 11000,0 g (388.01 oz) |
| Dieta | Eats aquatic plants, algae, and grasses; upends in shallow water to graze submerged vegetation; diet … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| Tamanho da postura | 1-6 | 5-7 |
| 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.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
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.
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in flight.
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.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Estado de conservação
Hawaiian Goose
Mute Swan
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 …
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
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.
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.