Coscoroba Swan vs Mallard
Coscoroba coscoroba comparado com Anas platyrhynchos
Side-by-Side Comparison
| Atributo | Coscoroba Swan | Mallard |
|---|---|---|
| Nome científico | Coscoroba coscoroba | Anas platyrhynchos |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | 58,0 cm (22.8 in) |
| Envergadura | 84,2 cm (33.1 in) | 90,0 cm (35.4 in) |
| Peso | 4200,0 g (148.15 oz) | 1100,0 g (38.80 oz) |
| Dieta | Eats seeds, aquatic plants, and invertebrates; dabbles and upends in shallow water; diet more invertebrate-heavy … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| Tamanho da postura | 4-9 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Coscoroba Swan
Freshwater lakes, marshes, lagoons, and flooded grasslands from southern Brazil through Uruguay, Chile, and Argentina to Tierra del Fuego. Partially migratory; moves northward in winter. Nests in reedy margins.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Coscoroba Swan
A bugling, honking 'coscoroba' call — giving the species its onomatopoeic name. Loud and far-carrying. Less commonly heard than northern hemisphere swans.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Coscoroba Swan
Breeds in western North American prairies and parklands; winters in California, the Southwest, and northern Mexico.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Estado de conservação
Coscoroba Swan
Mallard
How to Tell Them Apart
Coscoroba Swan
Entirely white plumage except black wingtips visible in flight. Bright red bill and red legs and feet. Red eye-ring. More goose-like than true swans. Juvenile has brownish wash. Sexes similar.
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
About These Birds
Coscoroba Swan
O cisne-coscoroba é um cisne incomum da América do Sul, o único membro do seu género. Ao contrário dos verdadeiros cisnes, não tem pescoço tão longo e assemelha-se mais a um ganso grande. Tem plumagem branca com pontas das asas pretas e bico e pernas vermelhas. Cria em zonas húmidas da Patagónia, Terra do Fogo e adjacentes e hiberna no norte da Argentina, Uruguai e sul do Brasil. O seu apelo sonoro é o nome 'cos-cor-o-ba' que lhe deu o …
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.