Black Swan vs Red-breasted Merganser
Cygnus atratus เปรียบเทียบกับ Mergus serrator
Side-by-Side Comparison
| คุณสมบัติ | Black Swan | Red-breasted Merganser |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Cygnus atratus | Mergus serrator |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | 130.0 cm (51.2 in) | — |
| กว้างปีก | 190.0 cm (74.8 in) | 46.7 cm (18.4 in) |
| น้ำหนัก | 6200.0 g (218.70 oz) | 1058.3333333333333 g (37.33 oz) |
| อาหาร | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Dives for small fish, crustaceans, and aquatic invertebrates in coastal and freshwater habitats. Pursues fish … |
| จำนวนไข่ | 4-6 | 6-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Black Swan only
ไม่มี
Red-breasted Merganser only
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.
Red-breasted Merganser
Male produces a harsh, rasping series of notes; female gives a rough, guttural grunting. The harsh, rattling call is louder than Goosander; pairs and flocks create a rasping coastal cacophony.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Red-breasted Merganser
Circumpolar breeder in boreal and Arctic zones. Winters on coasts and large water bodies south to the Mediterranean and southern Asia.
สถานะการอนุรักษ์
Black Swan
Red-breasted Merganser
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
Red-breasted Merganser
Male has dark green shaggy double crest, speckled chestnut breast band, white collar, and grey flanks; red bill. Female has rufous-brown head with ragged crest blending gradually into grey neck …
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.
Red-breasted Merganser
A medium-sized fish-eating duck (~1.1 kg) in family Anatidae, males with a ragged double crest, green head, and rufous breast band. Breeds near freshwater and coastal habitats across the Northern Hemisphere; winters in estuaries and coastal seas. Dives in pursuit of fish and invertebrates. Least Concern; one of the fastest flying ducks, reaching 100 km/h.