American Black Duck vs Magellanic Steamerduck
Anas rubripes 对比 Tachyeres pteneres
Side-by-Side Comparison
| 属性 | American Black Duck | Magellanic Steamerduck |
|---|---|---|
| 学名 | Anas rubripes | Tachyeres pteneres |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 53.4 cm (21.0 in) | 52.2 cm (20.6 in) |
| 体重 | 1211.25 g (42.73 oz) | 4881.25 g (172.18 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-17 | 4-8 |
| Population Trend | — | — |
Habitat Comparison
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.
Magellanic Steamerduck
Rocky coastal shores, kelp-fringed channels, and sheltered bays of Patagonian Chile and Argentina. Flightless; confined to coastline. Nests on rocky shorelines. Uses wings to propel across water surface.
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.
Magellanic Steamerduck
A loud, rattling, staccato 'kik-kik-kik' that sounds like a steam engine — hence 'steamerduck'. The wings also produce a loud churring sound as they beat the water surface.
保护状况
American Black Duck
Magellanic Steamerduck
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 …
Magellanic Steamerduck
Heavy, flightless. Males gray with white eye-stripe and orange-yellow bill. Breast and flanks mottled rufous-brown. Females more brown with white eye-ring and olive-yellow bill. Wings used for steaming.
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.
Magellanic Steamerduck
麦哲伦蒸汽鸭是最大的蒸汽鸭，分布于南美洲南端的智利和阿根廷麦哲伦地区以及相邻海岸。不会飞翔，体型粗大，翅短而圆。雄鸟头颈灰白色，体羽灰褐色，嘴橙黄色；雌鸟头部棕褐色。以软体动物和甲壳类为食，在岩石海岸活动。