Black Swan vs Northern Gannet
Cygnus atratus so với Morus bassanus
Side-by-Side Comparison
| Thuộc Tính | Black Swan | Northern Gannet |
|---|---|---|
| Tên Khoa Học | Cygnus atratus | Morus bassanus |
| Bộ | Anseriformes | Suliformes |
| Họ | Anatidae | Sulidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | 130,0 cm (51.2 in) | 93,0 cm (36.6 in) |
| Chiều Dài Sải Cánh | 190,0 cm (74.8 in) | 180,0 cm (70.9 in) |
| Khối Lượng | 6200,0 g (218.70 oz) | 3000,0 g (105.82 oz) |
| Chế Độ Ăn | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … | Shoaling fish, especially mackerel, herring, and capelin. Plunge-dives from heights of 30 meters at speeds … |
| Số Trứng | 4-6 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Northern Gannet
Open ocean and coastal waters. Breeds in dense colonies on steep rocky islands and sea stacks.
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.
Northern Gannet
Loud, harsh 'urrah-urrah' grunting and croaking at breeding colonies on sea stacks. Also gives a softer 'karrr' in flight. Large colonies are extremely noisy during the breeding season.
Geographic Range & Migration
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Northern Gannet
North Atlantic, breeding from Newfoundland and Gulf of St. Lawrence to Norway, Iceland, and Britain. Winters at sea south to the tropics.
Tình Trạng Bảo Tồn
Black Swan
Northern Gannet
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
Northern Gannet
Brilliant white body with black wingtips and a golden-yellow wash on the head and nape. Blue-grey bill with dark lines and pale blue eye-ring.
Long, straight, pointed, pale blue-grey bill with serrated edges
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.
Northern Gannet
The northern gannet is a spectacular plunge-diver, folding its two-meter wingspan into an arrow shape to hit the water at up to 100 km/h. Air sacs under the skin and a reinforced skull protect it from the impact. Bass Rock in Scotland hosts over 150,000 gannets, the largest single colony of any seabird in the world.