Red-breasted Goose vs Mandarin Duck
Branta ruficollis 比較対象 Aix galericulata
Side-by-Side Comparison
| 属性 | Red-breasted Goose | Mandarin Duck |
|---|---|---|
| 学名 | Branta ruficollis | Aix galericulata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | 44.0 cm (17.3 in) |
| 翼開長 | 69.1 cm (27.2 in) | 70.0 cm (27.6 in) |
| 体重 | 1253.25 g (44.21 oz) | 570.0 g (20.11 oz) |
| 食性 | Grazes grasses, seeds, and aquatic plants; introduced to many wetlands; upends in shallow water for … | Seeds, acorns, grains, aquatic plants, insects, snails, and small fish. Forages by dabbling, walking, and … |
| 一腹卵数 | 3-10 | 7-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Red-breasted Goose
Breeds on river-terrace tundra in northwestern Siberia, often near Peregrine or Rough-legged Buzzard nests for protection. Winters on agricultural steppes and lake margins around the Black Sea and Caspian Sea.
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
Red-breasted Goose
A high-pitched, rapid 'kik-kik-kik' call. More vocal during migration; flocks give constant chattering. Considered a more squeaky, high-pitched call than other Branta geese.
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
Red-breasted Goose
Breeds in Arctic and subarctic tundra in North America; winters along both US coasts and interior wetlands south to Central America.
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
Red-breasted Goose
Mandarin Duck
How to Tell Them Apart
Red-breasted Goose
Unmistakable; vivid chestnut-red patch on face and breast bordered by white stripes. Black crown, back, wings, and belly. White flank stripe and undertail. Compact and striking. Sexes similar.
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
Red-breasted Goose
アカノドガンはロシア北部のツンドラで繁殖し、ルーマニアや中央アジアで越冬する美しいガンです。赤褐色の喉と頬、白と黒の模様が特徴的です。草地や農地で採食します。絶滅危惧種に指定されており、越冬地での生息地破壊が主な脅威です。
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。