Brent Goose vs Barnacle Goose
Branta bernicla 比較対象 Branta leucopsis
Side-by-Side Comparison
| 属性 | Brent Goose | Barnacle Goose |
|---|---|---|
| 学名 | Branta bernicla | Branta leucopsis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 63.9 cm (25.2 in) | 76.4 cm (30.1 in) |
| 体重 | 1335.0 g (47.09 oz) | 1685.0 g (59.44 oz) |
| 食性 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Large white swan grazing aquatic plants and grasses; upends for submerged vegetation; supplements diet with … |
| 一腹卵数 | 1-10 | 2-9 |
| Population Trend | — | — |
Habitat Comparison
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering 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
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
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
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
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
Brent Goose
Barnacle Goose
How to Tell Them Apart
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
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
Brent Goose
北極圏で繁殖し、北半球の海岸で越冬する小型のガン（体長55〜66cm）。黒い頭・首・胸に短い白い首輪が特徴。Branta bernicla（コクガン）は主にアマモなどの海草を食べ、干潟や浅い入り江を好む。日本でも北海道・東北の海岸で越冬する姿が見られ、個体数は比較的少ない。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。