Ruddy-headed Goose vs Mute Swan
Chloephaga rubidiceps 比較対象 Cygnus olor
Side-by-Side Comparison
| 属性 | Ruddy-headed Goose | Mute Swan |
|---|---|---|
| 学名 | Chloephaga rubidiceps | Cygnus olor |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 152.0 cm (59.8 in) |
| 翼開長 | 65.1 cm (25.6 in) | 235.0 cm (92.5 in) |
| 体重 | 1756.8333333333333 g (61.97 oz) | 11000.0 g (388.01 oz) |
| 食性 | Feeds on grasses, grain, and aquatic invertebrates; grazes farmland and freshwater margins; diet heavier in … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 一腹卵数 | 3-8 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Ruddy-headed Goose
Breeds on open tussock grasslands and moorland in Tierra del Fuego and the Falkland Islands. Mainland wintering population on Patagonian grasslands now critically small. Falkland Islands population relatively stable.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Ruddy-headed Goose
A high, whistled 'whee' from males and a cackling rattle from females. Calls similar to Ashy-headed Goose. Falkland Islands population; calls in open coastal grassland.
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
Ruddy-headed Goose
Breeds in the coastal tundra of Siberia; winters in Southeast Asia and Australia. Long-distance migrant along the East Asian flyway.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
保全状況
Ruddy-headed Goose
Mute Swan
How to Tell Them Apart
Ruddy-headed Goose
Distinctive rufous-brown head and neck; body barred rufous and black above; underparts buff-white finely barred. Orange-yellow legs. White wing patches in flight. Compact; sexes similar. Falklands and Patagonia.
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
Ruddy-headed Goose
ルディーヘッドガンは南米南端のパタゴニアとフォークランド諸島に分布する小型のガン科鳥類です。雄は赤褐色の頭部と白い腹が特徴的です。草地に生息し、草を採食します。フォークランド諸島の繁殖個体群は激減しており、絶滅危惧種です。
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.