Greater White-fronted Goose vs Common Scoter
Anser albifrons 比較対象 Melanitta nigra
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Common Scoter |
|---|---|---|
| 学名 | Anser albifrons | Melanitta nigra |
| 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) | 44.2 cm (17.4 in) |
| 体重 | 2471.0 g (87.16 oz) | 1127.25 g (39.76 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | Dives for bivalves, especially cockles, mussels, and clams, in shallow coastal seas. Also eats crustaceans … |
| 一腹卵数 | 3-9 | 6-8 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Greater White-fronted Goose only
None
Common Scoter 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.
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.
Common Scoter
Male gives a soft, piping whistle; female produces a harsh, rasping call. The male's piping whistle is subtle; female's harsh calls dominate on European winter coasts and estuaries.
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.
Common Scoter
Breeds on moorland and boreal tundra from Iceland and Britain east to western Siberia. Winters on northwestern European coasts and the Baltic Sea.
保全状況
Greater White-fronted Goose
Common 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 …
Common Scoter
Male is entirely sooty black without white markings; orange-yellow patch on upper bill with small black knob. Female brownish-black above with contrasting pale cream cheeks and throat.
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。
Common Scoter
コモンスコーター。ヨーロッパと西アジアのツンドラで繁殖し、西ヨーロッパ沿岸で越冬する。雄は全身黒色で黄色い嘴基部が特徴的。貝類、甲殻類、小魚を潜水して捕食する。低危険種。