Greater White-fronted Goose vs Long-tailed Duck
Anser albifrons 比較対象 Clangula hyemalis
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Long-tailed Duck |
|---|---|---|
| 学名 | Anser albifrons | Clangula hyemalis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 81.6 cm (32.1 in) | 43.1 cm (17.0 in) |
| 体重 | 2471.0 g (87.16 oz) | 782.0 g (27.58 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | Dives deeply for crustaceans, molluscs, and small fish in Arctic and subarctic seas. Freshwater invertebrates … |
| 一腹卵数 | 3-9 | 2-11 |
| 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.
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.
Long-tailed Duck
Male sings a musical, yodeling ow-owlet-aaaalett sequence; female gives a low, grunting quack. The male's loud, harmonious yodeling is arguably the most musical call among all waterfowl species.
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.
Long-tailed Duck
Circumpolar High Arctic breeder. Winters at sea on coasts of northwestern Europe, northeastern North America, and the Bering Sea region.
保全状況
Greater White-fronted Goose
Long-tailed Duck
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 …
Long-tailed Duck
Male in winter is mostly white with dark brown chest band, scapulars, and cheek patch; elongated central tail feathers extend well beyond body. Female is brownish with white face, dark …
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。
Long-tailed Duck
A medium-sized Arctic sea duck (~780 g) in family Anatidae, males having elongated central tail feathers. Breeds across circumpolar tundra; winters in large flocks on coastal and open-ocean waters. Dives to impressive depths for crustaceans, fish, and mollusks. Vulnerable; steep population declines linked to bycatch in fishing nets and climate change.