Canvasback vs Mute Swan
Aythya valisineria 比較対象 Cygnus olor
Side-by-Side Comparison
| 属性 | Canvasback | Mute Swan |
|---|---|---|
| 学名 | Aythya valisineria | 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 | 44.7 cm (17.6 in) | 235.0 cm (92.5 in) |
| 体重 | 1223.25 g (43.15 oz) | 11000.0 g (388.01 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet dominated by … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 一腹卵数 | 2-16 | 5-7 |
| 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.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
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.
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
Canvasback
Breeds in wooded wetlands of Canada and the northern United States; winters in the southern US and Central America.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
保全状況
Canvasback
Mute 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 …
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
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。
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.