American Black Duck vs Rosy-billed Pochard
Anas rubripes مقارنةً بـ Netta peposaca
Side-by-Side Comparison
| السمة | American Black Duck | Rosy-billed Pochard |
|---|---|---|
| الاسم العلمي | Anas rubripes | Netta peposaca |
| الرتبة | Anseriformes | Anseriformes |
| الفصيلة | Anatidae | Anatidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 53,4 cm (21.0 in) | 46,1 cm (18.1 in) |
| الوزن | 1211,25 g (42.73 oz) | 1103,4 g (38.92 oz) |
| النظام الغذائي | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal water; diet dominated by invertebrates. |
| عدد البيض في الوضع | 1-17 | 10 |
| Population Trend | — | — |
Habitat Comparison
الموائل المشتركة
American Black Duck only
Rosy-billed Pochard only
بلا
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.
Rosy-billed Pochard
Freshwater lakes, marshes, and lagoons in southern South America from central Brazil through Bolivia, Uruguay, and Argentina to Patagonia. Often on large open lakes. Partially migratory; moves northward 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.
Rosy-billed Pochard
Male gives a deep, burping boom; female produces a loud, grunting quack. The male's resonant booming call during display is among the most powerful calls of South American wildfowl.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Rosy-billed Pochard
Breeds in northern prairies; winters on interior wetlands and coasts from the southern US to Central America.
حالة الحفاظ
American Black Duck
Rosy-billed Pochard
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 …
Rosy-billed Pochard
Males dark sooty-black with iridescent purple gloss on head; bright rosy-red bill with pink knob. White flanks visible when at rest. Females brown with pale face and gray bill. Bold …
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.
Rosy-billed Pochard
A large striking pochard. Males are black-and-grey with an unmistakable bulging bright red bill knob; females are brown. Found in freshwater lakes of southern South America. Common in the Pampas and Patagonia. Often dives to the lake bottom for aquatic plants.