Red-billed Teal vs American Black Duck
Anas erythrorhyncha в сравнении с Anas rubripes
Side-by-Side Comparison
| Характеристика | Red-billed Teal | American Black Duck |
|---|---|---|
| Научное название | Anas erythrorhyncha | Anas rubripes |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 43,0 cm (16.9 in) | 53,4 cm (21.0 in) |
| Масса | 648,0 g (22.86 oz) | 1211,25 g (42.73 oz) |
| Питание | Dives for molluscs, crustaceans, and small fish in coastal and freshwater habitats; diet shifts with … | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … |
| Размер кладки | 5-13 | 1-17 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Red-billed Teal only
Нет
American Black Duck only
Red-billed Teal
Freshwater lakes, marshes, pans, and flooded fields across sub-Saharan Africa from Ethiopia and Sudan south to the Cape. Nomadic; follows seasonal flooding. Very tolerant of saline conditions.
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.
Song & Call Comparison
Red-billed Teal
Female produces a loud, nasal quacking series; male gives a soft, nasal grunt. Both sexes call with emphatic, honking quacks that carry across African open wetlands and dams.
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.
Geographic Range & Migration
Red-billed Teal
Breeds in northern Eurasia and Arctic Canada; winters on open ocean in the North Atlantic and North Pacific.
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Охранный статус
Red-billed Teal
American Black Duck
How to Tell Them Apart
Red-billed Teal
Diagnostic bright pink-red bill with dark ridge contrasting with dark brown cap. Body brown, finely scalloped. White sides of face. Pale buff-white speculum with dark border. Sexes similar. Sub-Saharan Africa.
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 …
About These Birds
Red-billed Teal
A medium-sized teal with a distinctive red bill, dark brown cap and back, pale cheeks, and fine barring on the flanks. Common in sub-Saharan Africa, especially eastern and southern Africa. Nomadic; follows seasonal rainfall. One of Africa's most abundant ducks.
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.