American Black Duck vs Flying Steamerduck
Anas rubripes so với Tachyeres patachonicus
Side-by-Side Comparison
| Thuộc Tính | American Black Duck | Flying Steamerduck |
|---|---|---|
| Tên Khoa Học | Anas rubripes | Tachyeres patachonicus |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 53,4 cm (21.0 in) | 57,4 cm (22.6 in) |
| Khối Lượng | 1211,25 g (42.73 oz) | 2620,75 g (92.44 oz) |
| Chế Độ Ăn | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dabbles for seeds, invertebrates, and aquatic vegetation; widespread; diet varies from predominantly plant-based to invertebrate-rich. |
| Số Trứng | 1-17 | 5-9 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
American Black Duck only
Flying Steamerduck only
Không
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.
Flying Steamerduck
Freshwater lakes, rivers, coastal bays, and channels in Patagonian Chile and Argentina from the Lakes Region south to Tierra del Fuego. Partially migratory; some populations move to coasts in winter.
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.
Flying Steamerduck
A harsh, rattling 'rrrrr' and nasal calls. Flying Steamerduck can fly (unlike some relatives) and gives vocal calls in flight. Contact calls are clattering and guttural.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Flying Steamerduck
Breeds across the boreal and subarctic zone of North America; winters broadly across the southern United States and Mexico.
Tình Trạng Bảo Tồn
American Black Duck
Flying 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 …
Flying Steamerduck
Males gray with chestnut-brown breast and white eye-stripe. Females brown-gray with white eye-ring and chestnut flanks. Orange-yellow bill. Only Tachyeres species capable of sustained flight. Wings larger.
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.
Flying Steamerduck
The only flying species among the four steamerducks, with grey plumage, rufous-washed head, and an orange-yellow bill. Can fly strongly unlike its relatives. Found in Patagonian freshwater and coastal habitats. Highly territorial; pairs defend stretches of river or lakeshore aggressively.