Canvasback vs Black Swan
Aythya valisineria 比較対象 Cygnus atratus
Side-by-Side Comparison
| 属性 | Canvasback | Black Swan |
|---|---|---|
| 学名 | Aythya valisineria | Cygnus atratus |
| 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 | 44.7 cm (17.6 in) | 190.0 cm (74.8 in) |
| 体重 | 1223.25 g (43.15 oz) | 6200.0 g (218.70 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet dominated by … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| 一腹卵数 | 2-16 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Canvasback
Breeds on prairie potholes and boreal lakes across western North America. Winters on large open lakes, reservoirs, estuaries, and Chesapeake Bay. Sensitive to loss of prairie wetlands.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Canvasback
Male produces a low, cooing purr; female gives a harsh, rolling quacking series. Males whisper-call in rolling, cooing notes during courtship; female's harsh quacking is emphatic on North American marshes.
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.
Geographic Range & Migration
Canvasback
Breeds in wooded wetlands of Canada and the northern United States; winters in the southern US and Central America.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
保全状況
Canvasback
Black Swan
How to Tell Them Apart
Canvasback
Males have rich chestnut-red head and neck; black breast; pale canvas-gray body; white flanks. Sloping forehead profile with dark red bill and red eye. Females gray-brown with reddish-brown head. Dimorphic …
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
About These Birds
Canvasback
キャンバスバックは北米に分布する大型の潜水性カモです。雄は鮮やかな赤褐色の頭部と赤い目、白い体が特徴的です。内陸の湖や湿地に繁殖し、冬季には湾岸や大きな湖に集まります。イモチウキゴモ（Vallisneria）の塊茎を好んで潜って採食します。
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。