Greater White-fronted Goose vs Velvet Scoter
Anser albifrons 比較対象 Melanitta fusca
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Velvet Scoter |
|---|---|---|
| 学名 | Anser albifrons | Melanitta fusca |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 81.6 cm (32.1 in) | 51.8 cm (20.4 in) |
| 体重 | 2471.0 g (87.16 oz) | 1635.1666666666667 g (57.68 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | Dives for mussels, cockles, and crustaceans in coastal and brackish waters. Freshwater insects taken on … |
| 一腹卵数 | 3-9 | 7-9 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Greater White-fronted Goose only
None
Velvet Scoter only
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.
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.
Velvet Scoter
Male emits a low, melodious whistled note; female produces a guttural, rasping call. The male's soft whistle contrasts with the female's harsh, buzzy alarm call on European coasts.
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.
Velvet Scoter
Breeds in boreal forests of northern Europe and western Siberia. Winters on coasts of northwestern Europe, the Black Sea, and Caspian Sea.
保全状況
Greater White-fronted Goose
Velvet Scoter
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 …
Velvet Scoter
Male is jet black overall with a small white teardrop below eye and white speculum visible in flight; yellow-sided bill with black knob at base. Female is dark brown with …
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。
Velvet Scoter
北ヨーロッパ・アジアの森林湖で繁殖し、沿岸で越冬する大型の潜水ガモ（体長51〜58cm）。雄は光沢のある黒い体に白い翼斑と眼下の白点が特徴。Melanitta fusca（ビロードスズガモ）は主に二枚貝を食べ、荒波の沿岸でも潜水採食できる。日本の日本海側沿岸でも越冬が観察される。Anatidae科。