American Black Duck vs Magellanic Steamerduck
Anas rubripes comparé à Tachyeres pteneres
Side-by-Side Comparison
| Attribut | American Black Duck | Magellanic Steamerduck |
|---|---|---|
| Nom scientifique | Anas rubripes | Tachyeres pteneres |
| Ordre | Anseriformes | Anseriformes |
| Famille | Anatidae | Anatidae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | — | — |
| Envergure | 53,4 cm (21.0 in) | 52,2 cm (20.6 in) |
| Poids | 1211,25 g (42.73 oz) | 4881,25 g (172.18 oz) |
| Régime alimentaire | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Feeds on seeds, aquatic invertebrates, and plant matter; dabbles in wetlands; diet heavily invertebrate during … |
| Taille de la couvée | 1-17 | 4-8 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Magellanic Steamerduck only
Aucun(e)
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.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Magellanic Steamerduck
Breeds in the Arctic and sub-Arctic; winters on the open Pacific Ocean from British Columbia to Baja California.
Statut de conservation
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
A large flightless steamerduck with grey-blue plumage, a rust-orange head (male), and massive orange-red bill. Named for its habit of steaming across water using wings and feet. Found on rocky Patagonian coasts and sheltered channels. Among the world's heaviest ducks at up to 6 kg.