Black Swan vs Silver Teal
Cygnus atratus 比較対象 Spatula versicolor
Side-by-Side Comparison
| 属性 | Black Swan | Silver Teal |
|---|---|---|
| 学名 | Cygnus atratus | Spatula versicolor |
| 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) | 37.0 cm (14.6 in) |
| 体重 | 6200.0 g (218.70 oz) | 409.75 g (14.45 oz) |
| 食性 | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Dabbles for seeds, aquatic plants, and invertebrates; diet varies with season; forages in shallow ponds … |
| 一腹卵数 | 4-6 | 6-10 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Silver Teal
Freshwater wetlands, marshes, lakes, and flooded fields from sea level to 3,500 m in southern South America from Peru and Bolivia through Chile, Argentina, Uruguay, and southern Brazil.
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.
Silver Teal
Male produces a soft, nasal prrp note; female gives a subdued quack. Quiet vocalizations suit the species' secretive nature in South American reedy marshes.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Silver Teal
Breeds in sub-Arctic Europe and western Russia; winters on coasts of Western Europe, the Mediterranean, and the Caspian Sea.
保全状況
Black Swan
Silver Teal
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
Silver Teal
Black crown contrasting with white face and sides. Body pale silvery-gray with fine dark vermiculations. Bold yellow-and-black bill. Blue-gray forewing and iridescent green speculum in flight. Sexes similar.
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。
Silver Teal
A medium-sized teal with a striking black cap, white face, blue bill with yellow sides, and boldly spotted scaly-looking flanks. Widespread in lowland and mid-altitude South America. Often found in pairs or small groups. Feeds by dabbling in shallow water.