Black Swan vs Fulvous Whistling-duck
Cygnus atratus مقارنةً بـ Dendrocygna bicolor
Side-by-Side Comparison
| السمة | Black Swan | Fulvous Whistling-duck |
|---|---|---|
| الاسم العلمي | Cygnus atratus | Dendrocygna bicolor |
| الرتبة | Anseriformes | Anseriformes |
| الفصيلة | Anatidae | Anatidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | 130,0 cm (51.2 in) | — |
| طول الجناح | 190,0 cm (74.8 in) | 44,6 cm (17.6 in) |
| الوزن | 6200,0 g (218.70 oz) | 733,4 g (25.87 oz) |
| النظام الغذائي | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Grazes grasses and sedges in Arctic tundra; large migratory goose; winter diet dominated by agricultural … |
| عدد البيض في الوضع | 4-6 | 6-16 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Fulvous Whistling-duck
Freshwater marshes, rice paddies, flooded fields, shallow lakes, and river margins across warm tropical and subtropical regions of the Americas, Africa, and South Asia. Highly nomadic, following rains.
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.
Fulvous Whistling-duck
A soft, rhythmic 'ka-WHEE-00' whistle. Flocks give continuous soft whistling sounds during flight over tropical wetlands. Also gives shorter 'kee' contact notes.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Fulvous Whistling-duck
Breeds across Eurasia from Iceland and western Europe to eastern Siberia; winters from Britain to the Mediterranean and South Asia.
حالة الحفاظ
Black Swan
Fulvous Whistling-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
Fulvous Whistling-duck
Warm fulvous-buff underparts with creamy white flank stripes. Upperparts dark brown with pale buff feather edges. Dark brown stripe down back of neck. Long bluish-gray legs. Sexes identical.
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.
Fulvous Whistling-duck
A medium-sized whistling-duck with warm tawny-brown body, dark brown back, creamy-white flank stripes, and a blue-grey bill. Among the most cosmopolitan of all waterfowl, occurring in North and South America, sub-Saharan Africa, and South Asia. Highly nomadic, following seasonal rainfall.