American Black Duck vs Baer's Pochard
Anas rubripes в сравнении с Aythya baeri
Side-by-Side Comparison
| Характеристика | American Black Duck | Baer's Pochard |
|---|---|---|
| Научное название | Anas rubripes | Aythya baeri |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Critically Endangered |
| Длина | — | — |
| Размах крыльев | 53,4 cm (21.0 in) | 40,4 cm (15.9 in) |
| Масса | 1211,25 g (42.73 oz) | 707,25 g (24.95 oz) |
| Питание | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dives for molluscs and aquatic invertebrates; diet dominated by hard-shelled benthic prey in coastal shallow-water … |
| Размер кладки | 1-17 | 6-13 |
| 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.
Baer's Pochard
Breeds on lakes and rivers in boreal forests of eastern Siberia and northeastern China. Winters on freshwater lakes and wetlands in eastern and southeastern Asia. Critically Endangered; tiny remaining population.
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.
Baer's Pochard
Male gives a low, grating wheeze; female produces a harsh quacking series. Calls resemble Tufted Duck but slightly softer; among the rarest duck calls in East Asia due to its …
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Baer's Pochard
Breeds in Arctic Canada and Alaska; winters at sea off both US coasts and in the Great Lakes during migration.
Охранный статус
American Black Duck
Baer's 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 …
Baer's Pochard
Males have dark glossy greenish-black head; chestnut breast; white flanks and undertail. White eye. Females brown with chestnut breast and pale face patch. White wing stripe in flight. Critically endangered …
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.
Baer's Pochard
A medium-sized diving duck. Males have a glossy green-black head, chestnut breast, and white flanks; females are brown. Critically Endangered; one of the fastest declining ducks in Asia. Breeds in eastern Siberia; winters in eastern China and Southeast Asia. Threatened by hunting.