Snow Goose vs Black Swan
Anser caerulescens в сравнении с Cygnus atratus
Side-by-Side Comparison
| Характеристика | Snow Goose | Black Swan |
|---|---|---|
| Научное название | Anser caerulescens | Cygnus atratus |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | 130,0 cm (51.2 in) |
| Размах крыльев | 82,4 cm (32.4 in) | 190,0 cm (74.8 in) |
| Масса | 2561,0 g (90.34 oz) | 6200,0 g (218.70 oz) |
| Питание | Grazes submerged aquatic vegetation and eelgrass in estuaries; also takes grasses and sedges on coastal … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| Размер кладки | 2-6 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Snow Goose
Breeds on coastal and inland Arctic tundra in Canada, Alaska, and Greenland. Winters on agricultural fields, marshes, and coastal wetlands across the United States and northern Mexico. Forms enormous flocks.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Snow Goose
A loud, nasal barking 'luk-luk' or 'kow-kow'. Large flocks create enormous noise during Arctic nesting and winter staging. Considered a noisy, conspicuous goose.
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.
Geographic Range & Migration
Snow Goose
Breeds in eastern North America's boreal forest; winters on the Atlantic coast from New England to South Carolina.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Охранный статус
Snow Goose
Black Swan
How to Tell Them Apart
Snow Goose
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
About These Birds
Snow Goose
A distinctive goose with two morphs—white with black wingtips, or 'blue morph' with dark body and white head. Large flocks create spectacular migration events. Breeds in the Arctic; winters in the United States and Mexico. Population growth has caused severe overgrazing of Arctic salt marshes.
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.