Reunion Shelduck vs American Black Duck
Alopochen kervazoi 비교 대상 Anas rubripes
Side-by-Side Comparison
| 속성 | Reunion Shelduck | American Black Duck |
|---|---|---|
| 학명 | Alopochen kervazoi | Anas rubripes |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Extinct | Least Concern |
| 체장 | — | — |
| 날개 폭 | — | 53.4 cm (21.0 in) |
| 체중 | — | 1211.25 g (42.73 oz) |
| 식성 | Extinct Reunion shelduck; likely fed on grasses, seeds, and aquatic invertebrates near coastal wetlands based … | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … |
| 산란 수 | -- | 1-17 |
| Population Trend | — | — |
Habitat Comparison
Reunion Shelduck
Historically restricted to Réunion Island in the Mascarene archipelago. Now extinct; last evidence from early colonial period. Presumably inhabited freshwater wetland habitats on the island.
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Song & Call Comparison
Reunion Shelduck
Extinct (EX); no vocalizations recorded. The Reunion Shelduck was exterminated soon after European contact. No contemporary accounts of its call survive in the historical record.
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Geographic Range & Migration
Reunion Shelduck
Formerly found across the Pacific from Hawaii to New Zealand. Extinct by the 19th century; survived late on uninhabited islands.
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
보전 상태
Reunion Shelduck
American Black Duck
How to Tell Them Apart
Reunion Shelduck
Extinct Mascarene species known only from subfossil bones found on Réunion. Plumage unrecorded; presumed similar to Egyptian Goose with brownish-gray tones. Extirpated following European colonization.
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
About These Birds
Reunion Shelduck
인도양 레위니옹 섬에 고유하게 서식하던 멸종 오리류. 아亚화석 뼈와 이른 탐험가들의 역사적 기록으로만 알려져 있다.
American Black Duck
아메리카 검정 오리는 북아메리카 동부에 서식하는 중간 크기의 오리로, 말라드와 매우 유사하지만 전체적으로 더 어둡고 뚜렷한 보라색 날개 거울을 가지고 있습니다.