Yellow-billed Duck vs Black Swan
Anas undulata comparado com Cygnus atratus
Side-by-Side Comparison
| Atributo | Yellow-billed Duck | Black Swan |
|---|---|---|
| Nome científico | Anas undulata | Cygnus atratus |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | 130,0 cm (51.2 in) |
| Envergadura | 48,1 cm (18.9 in) | 190,0 cm (74.8 in) |
| Peso | 907,6666666666666 g (32.02 oz) | 6200,0 g (218.70 oz) |
| Dieta | Dives for fish, frogs, and aquatic invertebrates; uses serrated bill to grip prey; diet shifts … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| Tamanho da postura | 4-12 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Yellow-billed Duck
Freshwater lakes, rivers, marshes, and dams across eastern and southern Africa from Ethiopia and Uganda south to the Cape. Tolerates agricultural impoundments and urban wetlands. Largely sedentary.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Yellow-billed Duck
Female gives a loud, descending quacking series; male utters a soft, raspy rehb note. The female's strong quacking call is the dominant sound at sub-Saharan African wetlands.
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
Yellow-billed Duck
Found across sub-Saharan Africa from Senegal to Ethiopia and south to South Africa. Sedentary in freshwater wetlands.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Estado de conservação
Yellow-billed Duck
Black Swan
How to Tell Them Apart
Yellow-billed Duck
Brown body with scaly pale-edged feathers; head brown with paler face and throat. Diagnostic bright yellow bill with black central stripe. Iridescent green-and-black speculum with white borders. Sexes similar.
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
Yellow-billed Duck
O pato-amarelo é um pato dabbling de tamanho médio encontrado na África subsariana. Distingue-se pelo seu bico amarelo brilhante, que lhe dá o nome comum. A plumagem é castanha mosqueada com marcações nas asas verdes iridescentes. Habita uma ampla variedade de habitats de água doce, incluindo lagos, pântanos, rios e arrozais. É um dos patos mais comuns e amplamente distribuídos em África.
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.