Amsterdam Duck vs Mute Swan
Anas marecula 비교 대상 Cygnus olor
Side-by-Side Comparison
| 속성 | Amsterdam Duck | Mute Swan |
|---|---|---|
| 학명 | Anas marecula | Cygnus olor |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Extinct | Least Concern |
| 체장 | — | 152.0 cm (59.8 in) |
| 날개 폭 | — | 235.0 cm (92.5 in) |
| 체중 | 289.5 g (10.21 oz) | 11000.0 g (388.01 oz) |
| 식성 | Extinct Auckland Islands Merganser; fed on freshwater fish and aquatic invertebrates in streams; inferred from … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 산란 수 | -- | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Amsterdam Duck
Historically restricted to Amsterdam Island in the southern Indian Ocean. Now extinct. Presumably inhabited the island's freshwater sources and coastal areas.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Amsterdam Duck
Extinct (EX). No recordings exist. As an Anas relative, likely gave a typical duck-like quacking call; male may have had a soft whistled note similar to other island teals.
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
Amsterdam Duck
Breeds on sub-Antarctic islands of the South Indian Ocean; disperses across the Southern Ocean when not nesting.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
보전 상태
Amsterdam Duck
Mute Swan
How to Tell Them Apart
Amsterdam Duck
Extinct Amsterdam Island duck known only from bones and a single historical description. Presumably brown plumage typical of Anas dabbling ducks. Flightless or near-flightless; extirpated by introduced predators.
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
Amsterdam Duck
암스테르담 오리는 인도양의 암스테르담 섬에 서식했던 날지 못하는 오리였으나, 인간 정착과 도입된 포식자들로 인해 19세기에 멸종되었습니다. 짧은 날개와 작은 체구가 특징이었습니다.
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.