Red-billed Teal vs Black Swan
Anas erythrorhyncha в сравнении с Cygnus atratus
Side-by-Side Comparison
| Характеристика | Red-billed Teal | Black Swan |
|---|---|---|
| Научное название | Anas erythrorhyncha | Cygnus atratus |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | 130,0 cm (51.2 in) |
| Размах крыльев | 43,0 cm (16.9 in) | 190,0 cm (74.8 in) |
| Масса | 648,0 g (22.86 oz) | 6200,0 g (218.70 oz) |
| Питание | Dives for molluscs, crustaceans, and small fish in coastal and freshwater habitats; diet shifts with … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| Размер кладки | 5-13 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
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.
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
Geographic Range & Migration
Red-billed Teal
Breeds in northern Eurasia and Arctic Canada; winters on open ocean in the North Atlantic and North Pacific.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Охранный статус
Red-billed Teal
Black Swan
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.
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
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.
Black Swan
The black swan was once considered impossible by Europeans who believed all swans were white, making it a famous philosophical example of inductive reasoning failure. It is the state emblem of Western Australia. Black swans form lifelong pair bonds and both parents share in incubation and care of cygnets.