Barnacle Goose vs Mallard
Branta leucopsis 比較対象 Anas platyrhynchos
Side-by-Side Comparison
| 属性 | Barnacle Goose | Mallard |
|---|---|---|
| 学名 | Branta leucopsis | Anas platyrhynchos |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 58.0 cm (22.8 in) |
| 翼開長 | 76.4 cm (30.1 in) | 90.0 cm (35.4 in) |
| 体重 | 1685.0 g (59.44 oz) | 1100.0 g (38.80 oz) |
| 食性 | Large white swan grazing aquatic plants and grasses; upends for submerged vegetation; supplements diet with … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 一腹卵数 | 2-9 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Barnacle Goose
Breeds on inaccessible Arctic cliff ledges in Greenland, Svalbard, and Novaya Zemlya. Winters on coastal saltmarshes, pastures, and estuaries in northwestern Europe, particularly Scotland and Ireland.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Barnacle Goose
A rapid, high-pitched barking 'uk-uk-uk' given rapidly in flocks. Higher-pitched and more rapid than Canada Goose. Migrating flocks create a constant excited barking chorus.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Barnacle Goose
Breeds in Arctic tundra of Alaska and Canada; winters on the Pacific and Atlantic coasts of the United States and northern Mexico.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
保全状況
Barnacle Goose
Mallard
How to Tell Them Apart
Barnacle Goose
Striking black, white and gray pattern. White face and forehead; black crown, neck, and upper breast. Gray back with black and white barring. White underparts. Black tail. Sexes similar; elegant …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
About These Birds
Barnacle Goose
シロガシラガンはグリーンランド、スバールバル諸島、ロシア北西部に繁殖し、ヨーロッパ北西部で越冬するガンです。白い顔と黒い首が特徴的です。海岸の崖上に営巣し、ヒナは崖から飛び降りて親の後を追うことで有名です。塩性湿地や農地で採食します。
Mallard
世界で最も一般的なカモ。雄は光沢のある緑色の頭、白い首輪、栗色の胸が特徴。体長50〜65cm。ほぼ世界中の湖、川、池、湿地に生息。雑食性で植物や無脊椎動物を食べる。多くの家禽カモの祖先。低危険種。