Brazilian Merganser vs Mute Swan
Mergus octosetaceus 비교 대상 Cygnus olor
Side-by-Side Comparison
| 속성 | Brazilian Merganser | Mute Swan |
|---|---|---|
| 학명 | Mergus octosetaceus | Cygnus olor |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Critically Endangered | Least Concern |
| 체장 | — | 152.0 cm (59.8 in) |
| 날개 폭 | 39.2 cm (15.4 in) | 235.0 cm (92.5 in) |
| 체중 | 827.6666666666666 g (29.20 oz) | 11000.0 g (388.01 oz) |
| 식성 | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 산란 수 | 5-8 | 5-7 |
| 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
Brazilian Merganser
Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.
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
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
보전 상태
Brazilian Merganser
Mute Swan
How to Tell Them Apart
Brazilian Merganser
Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.
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
Brazilian Merganser
중형 물오리로 체장 약 55cm이며, 수컷은 광택 있는 녹색 머리, 흰 몸통, 빨간 부리를 갖는다. 남아메리카 내륙 강과 청정 하천에 서식한다. 잠수하여 어류를 먹는다. 위기 상태이다.
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.