Eastern Spot-billed Duck vs Greater White-fronted Goose
Anas zonorhyncha 比較対象 Anser albifrons
Side-by-Side Comparison
| 属性 | Eastern Spot-billed Duck | Greater White-fronted Goose |
|---|---|---|
| 学名 | Anas zonorhyncha | Anser albifrons |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 53.6 cm (21.1 in) | 81.6 cm (32.1 in) |
| 体重 | 1017.5 g (35.89 oz) | 2471.0 g (87.16 oz) |
| 食性 | Eats fish, aquatic invertebrates, and amphibians; dives in freshwater rivers; serrated bill grips prey; fish … | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … |
| 一腹卵数 | 7-9 | 3-9 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Eastern Spot-billed Duck only
None
Greater White-fronted Goose only
Eastern Spot-billed Duck
Freshwater lakes, rivers, marshes, and rice paddies in northeastern Asia from eastern Russia and Siberia through China, Korea, and Japan. Winters in southern China and southern Japan.
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
Eastern Spot-billed Duck
Female produces a loud, descending quacking series; male gives a low, nasal grunt. Vocalizations closely resemble the Indian Spot-billed Duck; pairs call antiphonally on East Asian wetlands.
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.
Geographic Range & Migration
Eastern Spot-billed Duck
Found in wetlands across Southeast Asia, from India to China, Vietnam, and Indonesia. Largely resident; local seasonal movements.
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.
保全状況
Eastern Spot-billed Duck
Greater White-fronted Goose
How to Tell Them Apart
Eastern Spot-billed Duck
Brown body with pale buff face and throat; dark crown and eye stripe. Yellow-tipped black bill lacking the red spot of Indian Spot-billed Duck. Iridescent green speculum with white border. …
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 …
About These Birds
Eastern Spot-billed Duck
オナガガモに似たこのカモは東アジアに分布し、中国、ロシア極東、日本などに生息します。嘴に黄色い斑点があるのが特徴で、湿地や水田、池に生息します。冬季には暖かい地方に渡りますが、一部は通年同じ地域に留まります。
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。