Black Swan vs Ashy-headed Goose
Cygnus atratus 比較対象 Chloephaga poliocephala
Side-by-Side Comparison
| 属性 | Black Swan | Ashy-headed Goose |
|---|---|---|
| 学名 | Cygnus atratus | Chloephaga poliocephala |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 130.0 cm (51.2 in) | — |
| 翼開長 | 190.0 cm (74.8 in) | 69.1 cm (27.2 in) |
| 体重 | 6200.0 g (218.70 oz) | 1779.25 g (62.76 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Eats grasses, seeds, and aquatic invertebrates; grazes upland pastures and dabbles in wetlands; diet varies … |
| 一腹卵数 | 4-6 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Ashy-headed Goose
Temperate forests, forest clearings, and lake margins in southern Chile and Patagonian Argentina. Partially migratory; breeds in beech forest zones and winters on open grasslands farther north.
Song & Call Comparison
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
Ashy-headed Goose
A whistled 'seeeeu' from males and a lower cackling from females. Ashy-headed Goose calls carry across Andean foothills and Patagonian grassland habitats.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Ashy-headed Goose
Inhabits wetlands and flooded grasslands across South and Southeast Asia, from India to Indonesia. Largely resident year-round.
保全状況
Black Swan
Ashy-headed Goose
How to Tell Them Apart
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
Ashy-headed Goose
Gray head and neck contrast with chestnut breast and rufous-barred flanks. Back brown; belly white. White wing patch in flight with iridescent green speculum. Yellow-orange legs. Sexes similar but females …
About These Birds
Black Swan
コクチョウはかつてすべての白鳥は白いと信じていたヨーロッパ人に不可能と考えられており、帰納的推論の失敗の有名な哲学的な例となっている。西オーストラリア州の州の鳥。コクチョウは生涯続く番いの絆を形成し、両親が共同で抱卵と雛の世話を行う。
Ashy-headed Goose
アスウェイウィンガンはアンデス山脈の湿地と草原に生息するガン科鳥類です。灰色の頭部と白黒の翼が特徴的です。チリとアルゼンチンの南部に分布し、草地、農地、湿地に生息します。草や農作物を採食します。