Mallard vs Brazilian Merganser
Anas platyrhynchos 对比 Mergus octosetaceus
Side-by-Side Comparison
| 属性 | Mallard | Brazilian Merganser |
|---|---|---|
| 学名 | Anas platyrhynchos | Mergus octosetaceus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Critically Endangered |
| 体长 | 58.0 cm (22.8 in) | — |
| 翼展 | 90.0 cm (35.4 in) | 39.2 cm (15.4 in) |
| 体重 | 1100.0 g (38.80 oz) | 827.6666666666666 g (29.20 oz) |
| 食性 | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| 产卵数 | 4-18 | 5-8 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
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.
Geographic Range & Migration
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
保护状况
Mallard
Brazilian Merganser
How to Tell Them Apart
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
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.
About These Birds
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.
Brazilian Merganser
巴西秋沙鸭是南美洲最濒危的鸭类之一，仅分布于巴西南部、阿根廷和巴拉圭的溪流和河流。雄鸟头部深绿色，嘴部橙红色，体羽灰白色具黑色横纹；雌鸟头部棕褐色。由于河流污染、水坝建设和采矿活动，种群数量已不足250只，被列为极危物种。