Mute Swan vs Green Pygmy-goose
Cygnus olor 比較対象 Nettapus pulchellus
Side-by-Side Comparison
| 属性 | Mute Swan | Green Pygmy-goose |
|---|---|---|
| 学名 | Cygnus olor | Nettapus pulchellus |
| 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 | 235.0 cm (92.5 in) | 33.8 cm (13.3 in) |
| 体重 | 11000.0 g (388.01 oz) | 328.75 g (11.60 oz) |
| 食性 | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … | Eats seeds, aquatic plants, and invertebrates; dabbles in shallow fresh water; diet varies between seasons … |
| 一腹卵数 | 5-7 | 8-12 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Green Pygmy-goose
Lily-covered tropical freshwater billabongs, lagoons, and seasonal floodplains in New Guinea and the tropical Top End of the Northern Territory and Queensland, Australia. Highly dependent on aquatic vegetation.
Song & Call Comparison
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.
Green Pygmy-goose
Male gives a high-pitched, melodic two-note whistle; female produces a quiet, nasal grunt. Courtship includes rapid chattering exchanges between paired birds on tropical lagoons.
Geographic Range & Migration
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Green Pygmy-goose
Breeds across northern and central Eurasia; winters in tropical Africa and South Asia.
保全状況
Mute Swan
Green Pygmy-goose
How to Tell Them Apart
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
Green Pygmy-goose
Males have dark green head and neck with white cheek patch; dark back; white underparts; flanks gray-green with fine barring. Females duller with brown cap and white face. White wing …
About These Birds
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.
Green Pygmy-goose
グリーンピグミーグースはオーストラリア北部と東南アジアに分布する小型の木巣性カモです。雄は緑色の羽毛と白い斑点が美しいです。熱帯・亜熱帯の水草が豊富な湖、池、湿地に生息し、蓮の種子や水草を採食します。