Greater White-fronted Goose vs Barnacle Goose
Anser albifrons 比較対象 Branta leucopsis
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Barnacle Goose |
|---|---|---|
| 学名 | Anser albifrons | Branta leucopsis |
| 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) | 76.4 cm (30.1 in) |
| 体重 | 2471.0 g (87.16 oz) | 1685.0 g (59.44 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | Large white swan grazing aquatic plants and grasses; upends for submerged vegetation; supplements diet with … |
| 一腹卵数 | 3-9 | 2-9 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Greater White-fronted Goose only
None
Barnacle Goose only
None
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.
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.
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.
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.
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.
Barnacle Goose
Breeds in Arctic tundra of Alaska and Canada; winters on the Pacific and Atlantic coasts of the United States and northern Mexico.
保全状況
Greater White-fronted Goose
Barnacle 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 …
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 …
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。
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。