Mallard vs Blue-billed Duck
Anas platyrhynchos comparado com Oxyura australis
Side-by-Side Comparison
| Atributo | Mallard | Blue-billed Duck |
|---|---|---|
| Nome científico | Anas platyrhynchos | Oxyura australis |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | 58,0 cm (22.8 in) | — |
| Envergadura | 90,0 cm (35.4 in) | 30,8 cm (12.1 in) |
| Peso | 1100,0 g (38.80 oz) | 837,75 g (29.55 oz) |
| Dieta | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … | Dives for aquatic invertebrates, seeds, and plant material in Australian freshwater lakes and swamps. Highly … |
| Tamanho da postura | 4-18 | 5-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
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.
Blue-billed Duck
Male produces a mechanical, splashing display call with loud bill-drumming; female gives a harsh quack. The male's bizarre bubbling-cum-drumming display is spectacular on Australian lakes.
Geographic Range & Migration
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Blue-billed Duck
Resident in southwestern and southeastern Australia. Found on freshwater swamps and lakes, avoiding arid and tropical regions.
Estado de conservação
Mallard
Blue-billed Duck
How to Tell Them Apart
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
Blue-billed Duck
Breeding male is deep rich chestnut with black head and broad bright blue bill; tail often held erect. Female is dark brown with finely barred buff pattern on body and …
About These Birds
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.
Blue-billed Duck
O pato-azul australiano é um pequeno pato de cauda rígida endémico do sul e este da Austrália. Os machos têm cabeça preta escura, bico azul brilhante e corpo castanho-avermelhado. Habita lagos e pântanos de água doce com vegetação emergente densa. É um mergulhador talentoso e move-se com dificuldade em terra. É considerado vulnerável em algumas partes do seu alcance devido à perda de habitat. A qualidade e disponibilidade das zonas húmidas são críticas para a sua sobrevivência.