American Black Duck vs Red-breasted Merganser
Anas rubripes 对比 Mergus serrator
Side-by-Side Comparison
| 属性 | American Black Duck | Red-breasted Merganser |
|---|---|---|
| 学名 | Anas rubripes | Mergus serrator |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 53.4 cm (21.0 in) | 46.7 cm (18.4 in) |
| 体重 | 1211.25 g (42.73 oz) | 1058.3333333333333 g (37.33 oz) |
| 食性 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dives for small fish, crustaceans, and aquatic invertebrates in coastal and freshwater habitats. Pursues fish … |
| 产卵数 | 1-17 | 6-14 |
| Population Trend | — | — |
Habitat Comparison
共同栖息地
American Black Duck only
Red-breasted Merganser only
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Song & Call Comparison
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Red-breasted Merganser
Male produces a harsh, rasping series of notes; female gives a rough, guttural grunting. The harsh, rattling call is louder than Goosander; pairs and flocks create a rasping coastal cacophony.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Red-breasted Merganser
Circumpolar breeder in boreal and Arctic zones. Winters on coasts and large water bodies south to the Mediterranean and southern Asia.
保护状况
American Black Duck
Red-breasted Merganser
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
Red-breasted Merganser
Male has dark green shaggy double crest, speckled chestnut breast band, white collar, and grey flanks; red bill. Female has rufous-brown head with ragged crest blending gradually into grey neck …
About These Birds
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.
Red-breasted Merganser
红胸秋沙鸭以雄鸟胸部栗红色鳞状斑纹为特征，嘴橙红色，头部深绿色有冠羽。广泛繁殖于欧亚和北美北部，越冬于温带沿海海湾和内陆水域。在地面或岩缝中营巢，以鱼类为主食，善于合作围捕鱼群。常在沿海越冬，是三种秋沙鸭中最耐盐水的。