Black Swan vs Harlequin Duck
Cygnus atratus в сравнении с Histrionicus histrionicus
Side-by-Side Comparison
| Характеристика | Black Swan | Harlequin Duck |
|---|---|---|
| Научное название | Cygnus atratus | Histrionicus histrionicus |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | 130,0 cm (51.2 in) | — |
| Размах крыльев | 190,0 cm (74.8 in) | 38,8 cm (15.3 in) |
| Масса | 6200,0 g (218.70 oz) | 553,0 g (19.51 oz) |
| Питание | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Forages in fast-flowing streams for aquatic insect larvae, amphipods, and small fish. Dives and clings … |
| Размер кладки | 4-6 | 3-9 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
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.
Harlequin Duck
Male gives a squeaky, mouse-like squeal; female produces a guttural, grunting call. The male's bizarre, high-pitched squealing call is completely unexpected in such a compact seaduck.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Harlequin Duck
Breeds on fast-flowing rivers in Iceland, Greenland, and northern North America. Winters along rocky Pacific and Atlantic coasts south to California.
Охранный статус
Black Swan
Harlequin Duck
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
Harlequin Duck
Male is slate-blue with bold white crescent before eye, white spots and streaks on head, neck, and scapulars, and rich chestnut flanks. Female is dark sooty-brown with three white facial …
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.
Harlequin Duck
A compact sea duck (~550 g) in family Anatidae, males strikingly patterned in slate-blue with chestnut and white markings. Breeds along fast-flowing mountain streams in North America, Greenland, and Iceland; winters on rocky surf-swept coastlines. Feeds on aquatic invertebrates. Least Concern with stable populations across its range.