Mute Swan vs Common Eider
Cygnus olor 比較対象 Somateria mollissima
Side-by-Side Comparison
| 属性 | Mute Swan | Common Eider |
|---|---|---|
| 学名 | Cygnus olor | Somateria mollissima |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | 152.0 cm (59.8 in) | — |
| 翼開長 | 235.0 cm (92.5 in) | 56.0 cm (22.0 in) |
| 体重 | 11000.0 g (388.01 oz) | 2042.8333333333333 g (72.06 oz) |
| 食性 | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … | Dives for blue mussels, clams, and crustaceans in shallow coastal waters. Swallows shellfish whole and … |
| 一腹卵数 | 5-7 | 2-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
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.
Common Eider
Male produces a loud, resonant ah-WOOO cooing; female gives a deep, guttural quacking series. The male's iconic moaning call echoes across North Atlantic coastlines; a classic seaduck sound.
Geographic Range & Migration
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Common Eider
Breeds on Arctic and subarctic coasts from the North Atlantic to the Pacific. Winters along coasts of northwestern Europe and eastern North America.
保全状況
Mute Swan
Common Eider
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
Common Eider
Male is strikingly pied: white back, neck, and breast contrasting with black cap, belly, and flanks; nape washed pale lime-green. Female uniformly barred warm tawny-brown with darker streaks.
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.
Common Eider
北極圏から温帯の海岸で繁殖する大型の潜水ガモ（体長50〜71cm）。雄は白・黒の体に緑の後頭部が特徴的。Somateria mollissima（ホンケワタガモ）の雌は抱卵時に自分の胸の羽（エイダーダウン）を抜いて卵を覆い、これが世界最高の天然断熱材として知られる。Anatidae科。