Mauritius Shelduck vs Greater White-fronted Goose
Alopochen mauritiana 比較対象 Anser albifrons
Side-by-Side Comparison
| 属性 | Mauritius Shelduck | Greater White-fronted Goose |
|---|---|---|
| 学名 | Alopochen mauritiana | Anser albifrons |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Extinct | Least Concern |
| 体長 | — | — |
| 翼開長 | — | 81.6 cm (32.1 in) |
| 体重 | — | 2471.0 g (87.16 oz) |
| 食性 | Extinct Mauritius shelduck; likely grazed on grasses and aquatic plants near wetlands; diet inferred from … | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … |
| 一腹卵数 | -- | 3-9 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Mauritius Shelduck only
None
Greater White-fronted Goose only
Mauritius Shelduck
Historically inhabited wetlands, rivers, and lowland areas of Mauritius. Now extinct; last records from the early colonial period.
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
Mauritius Shelduck
Extinct (EX); no vocalizations documented. The Mauritius Shelduck was last seen in the 1690s. Any description would be speculative given total absence of written records.
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
Mauritius Shelduck
Formerly endemic to Mauritius, Indian Ocean. Extinct; known only from 17th-century accounts and subfossil bones found on the island.
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
Mauritius Shelduck
Greater White-fronted Goose
How to Tell Them Apart
Mauritius Shelduck
Extinct Mascarene shelduck known only from fossil and subfossil remains. Likely brownish plumage similar to Egyptian Goose relatives; presumed sexual dimorphism. Extinct by late 17th century.
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
Mauritius Shelduck
An extinct shelduck formerly endemic to Mauritius. Known from subfossil bones and historical records from the 17th century. Likely resembled the Egyptian Goose. Went extinct after European colonization due to hunting and introduced predators. No description of living birds exists.
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。