Meller's Duck vs Brent Goose
Anas melleri 比較対象 Branta bernicla
Side-by-Side Comparison
| 属性 | Meller's Duck | Brent Goose |
|---|---|---|
| 学名 | Anas melleri | Branta bernicla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Endangered | Least Concern |
| 体長 | — | — |
| 翼開長 | 49.1 cm (19.3 in) | 63.9 cm (25.2 in) |
| 体重 | 1023.625 g (36.11 oz) | 1335.0 g (47.09 oz) |
| 食性 | Dives for fish and aquatic invertebrates in fast-flowing rivers; serrated bill grips slippery fish; diet … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| 一腹卵数 | 5-11 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Meller's Duck
Freshwater lakes, marshes, rivers, and rice paddies in the eastern highlands and north of Madagascar. Prefers undisturbed native forest wetlands. Endangered by hunting and habitat conversion.
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Meller's Duck
Female produces a loud, resonant quacking sequence; male gives a soft, nasal grunt. This large Malagasy duck vocalizes with powerful quacking calls along forest rivers and marshes.
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Geographic Range & Migration
Meller's Duck
Resident in wetlands and lakes from Turkey and Egypt through East Africa to the Cape. Non-migratory and widely distributed.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
保全状況
Meller's Duck
Brent Goose
How to Tell Them Apart
Meller's Duck
Dark brown-olive plumage streaked and mottled with pale buff; resembles large dark Mallard without green head. Iridescent green speculum with white borders. Yellow-brown bill; orange legs. Madagascar endemic.
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
About These Birds
Meller's Duck
A large brown dabbling duck resembling a female Mallard but larger, with green iridescent speculum and orange bill. Endemic to Madagascar. Endangered; threatened by hunting and wetland loss. One of Madagascar's rarest birds.
Brent Goose
北極圏で繁殖し、北半球の海岸で越冬する小型のガン（体長55〜66cm）。黒い頭・首・胸に短い白い首輪が特徴。Branta bernicla（コクガン）は主にアマモなどの海草を食べ、干潟や浅い入り江を好む。日本でも北海道・東北の海岸で越冬する姿が見られ、個体数は比較的少ない。Anatidae科。