Mute Swan vs Blue-billed Duck
Cygnus olor 对比 Oxyura australis
Side-by-Side Comparison
| 属性 | Mute Swan | Blue-billed Duck |
|---|---|---|
| 学名 | Cygnus olor | Oxyura australis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 152.0 cm (59.8 in) | — |
| 翼展 | 235.0 cm (92.5 in) | 30.8 cm (12.1 in) |
| 体重 | 11000.0 g (388.01 oz) | 837.75 g (29.55 oz) |
| 食性 | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … | Dives for aquatic invertebrates, seeds, and plant material in Australian freshwater lakes and swamps. Highly … |
| 产卵数 | 5-7 | 5-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in 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
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Blue-billed Duck
Resident in southwestern and southeastern Australia. Found on freshwater swamps and lakes, avoiding arid and tropical regions.
保护状况
Mute Swan
Blue-billed Duck
How to Tell Them Apart
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
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
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.
Blue-billed Duck
澳洲硬尾鸭是澳大利亚特有的小型潜鸭，以其刚硬的尾羽著称，常竖起尾羽游泳。雄鸟繁殖羽头部黑色，体羽棕红色，嘴部亮蓝色；雌鸟褐色，嘴黑色。栖息于澳大利亚南部的湖泊和沼泽，以水生植物和无脊椎动物为食。