Greater White-fronted Goose vs Snow Goose
Anser albifrons 比較対象 Anser caerulescens
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Snow Goose |
|---|---|---|
| 学名 | Anser albifrons | Anser caerulescens |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 81.6 cm (32.1 in) | 82.4 cm (32.4 in) |
| 体重 | 2471.0 g (87.16 oz) | 2561.0 g (90.34 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | Grazes submerged aquatic vegetation and eelgrass in estuaries; also takes grasses and sedges on coastal … |
| 一腹卵数 | 3-9 | 2-6 |
| Population Trend | — | — |
Habitat Comparison
Greater White-fronted Goose
Breeds on Arctic and subarctic tundra and peatlands. Winters on estuaries, agricultural fields, freshwater marshes, and flooded meadows across Europe, Asia, and North America. One of the most widespread geese.
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.
Song & Call Comparison
Greater White-fronted Goose
A loud, laughing 'kow-lyuk' or musical 'wah-wah'. Gives a distinctive high-pitched yodeling quality lacking in Greylag. Highly vocal in large winter flocks.
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.
Geographic Range & Migration
Greater White-fronted Goose
Breeds in the potholes region of the northern Great Plains; winters in the southern United States and along the Gulf Coast.
Snow Goose
Breeds in eastern North America's boreal forest; winters on the Atlantic coast from New England to South Carolina.
保全状況
Greater White-fronted Goose
Snow Goose
How to Tell Them Apart
Greater White-fronted Goose
Brown-gray body with white forehead patch bordered by white band at bill base. Underparts with bold irregular black bars on belly. Orange bill; orange-yellow legs. Juveniles lack white front and …
Snow Goose
About These Birds
Greater White-fronted Goose
北極圏で繁殖し、温帯で越冬する大型のガン（体長64〜81cm）。成鳥は白い額と黒い腹部の横縞が特徴。Anser albifrons（マガン）は東アジア、ヨーロッパ、北米の広大な農地や湿地で越冬する。日本では宮城県伊豆沼などが重要な越冬地で、数万羽が集まる壮観な光景が見られる。Anatidae科。
Snow Goose
北極圏（カナダ、シベリア）で繁殖し、北米南部や東アジアで越冬するガン（体長64〜79cm）。白色型と青灰色型（ブルーグース）の2つの色彩型がある。Anser caerulescens（ハクガン）は渡りの際に何百万羽もの大群を形成することで知られ、農業地帯での農作物被害が問題になることもある。Anatidae科。