Black Swan vs Ruddy Shelduck
Cygnus atratus comparé à Tadorna ferruginea
Side-by-Side Comparison
| Attribut | Black Swan | Ruddy Shelduck |
|---|---|---|
| Nom scientifique | Cygnus atratus | Tadorna ferruginea |
| Ordre | Anseriformes | Anseriformes |
| Famille | Anatidae | Anatidae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | 130,0 cm (51.2 in) | — |
| Envergure | 190,0 cm (74.8 in) | 71,1 cm (28.0 in) |
| Poids | 6200,0 g (218.70 oz) | 1318,3333333333333 g (46.50 oz) |
| Régime alimentaire | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Feeds on seeds, plant material, and aquatic invertebrates; dabbles in wetlands; diet varies between seasons … |
| Taille de la couvée | 4-6 | 8-16 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Ruddy Shelduck
Steppe lakes, river valleys, inland saline and freshwater wetlands from southeastern Europe and North Africa east through Central Asia to China and Mongolia. Winters on lakes and rivers in South and Southeast Asia.
Song & Call Comparison
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.
Ruddy Shelduck
A loud, resonant bugling 'aakh' from males; females give a rapid cackling 'kak-kak-kak'. Call carries far across open Asian steppe and river valleys.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Ruddy Shelduck
Breeds in wetlands across Eurasia; winters from sub-Saharan Africa to South and Southeast Asia. Broad wintering distribution.
Statut de conservation
Black Swan
Ruddy Shelduck
How to Tell Them Apart
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
Ruddy Shelduck
Warm orange-rufous overall plumage; paler buffy head. Males have narrow black neck collar in breeding season. Black tail and primaries. White wing coverts and iridescent green speculum visible in flight. …
About These Birds
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.
Ruddy Shelduck
A large orange-brown shelduck with a pale buff head, black neck ring (male only), white wing patches, and bright green speculum. Widespread from Morocco and southeastern Europe east to China. Sacred to Buddhists in Tibet. Nests in burrows, rock crevices, and ruins.