Amsterdam Duck vs Mandarin Duck
Anas marecula 比較対象 Aix galericulata
Side-by-Side Comparison
| 属性 | Amsterdam Duck | Mandarin Duck |
|---|---|---|
| 学名 | Anas marecula | Aix galericulata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Extinct | Least Concern |
| 体長 | — | 44.0 cm (17.3 in) |
| 翼開長 | — | 70.0 cm (27.6 in) |
| 体重 | 289.5 g (10.21 oz) | 570.0 g (20.11 oz) |
| 食性 | Extinct Auckland Islands Merganser; fed on freshwater fish and aquatic invertebrates in streams; inferred from … | Seeds, acorns, grains, aquatic plants, insects, snails, and small fish. Forages by dabbling, walking, and … |
| 一腹卵数 | -- | 7-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Amsterdam Duck
Historically restricted to Amsterdam Island in the southern Indian Ocean. Now extinct. Presumably inhabited the island's freshwater sources and coastal areas.
Mandarin Duck
Wooded lakes, rivers, and ponds surrounded by dense forest. Unlike most ducks, regularly perches in trees and nests in tree cavities.
Song & Call Comparison
Amsterdam Duck
Extinct (EX). No recordings exist. As an Anas relative, likely gave a typical duck-like quacking call; male may have had a soft whistled note similar to other island teals.
Mandarin Duck
Male gives a low whistled 'hib' or 'weep'. Female utters a soft quacking 'kek'. Generally quiet and secretive. No loud territorial song; vocalizations subtle and brief.
Geographic Range & Migration
Amsterdam Duck
Breeds on sub-Antarctic islands of the South Indian Ocean; disperses across the Southern Ocean when not nesting.
Mandarin Duck
Native to East Asia including eastern Russia, China, Japan, and Korea. Feral populations established in Britain and western Europe.
保全状況
Amsterdam Duck
Mandarin Duck
How to Tell Them Apart
Amsterdam Duck
Extinct Amsterdam Island duck known only from bones and a single historical description. Presumably brown plumage typical of Anas dabbling ducks. Flightless or near-flightless; extirpated by introduced predators.
Mandarin Duck
Breeding males have an elaborate pattern of orange, green, white, and purple with distinctive orange sail feathers on the back. Females are grey-brown with a white eye-ring and stripe.
Small red bill in breeding males, pinkish in females
About These Birds
Amsterdam Duck
An extinct diving duck known from subfossil remains discovered on Amsterdam Island in the southern Indian Ocean. Flightless or nearly flightless; probably resembled the Laysan Duck in size. Went extinct around 1800 following human colonization of the island.
Mandarin Duck
オシドリ。東アジア原産の美しいカモ。雄は鮮やかなオレンジ色の「帆羽」と複雑な羽毛模様が特徴的。体長41〜49cm。森林の池や川に生息し、樹洞に巣を作る。ドングリや水草を食べる。低危険種。