Reunion Shelduck vs African Black Duck
Alopochen kervazoi 对比 Anas sparsa
Side-by-Side Comparison
| 属性 | Reunion Shelduck | African Black Duck |
|---|---|---|
| 学名 | Alopochen kervazoi | Anas sparsa |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Extinct | Least Concern |
| 体长 | — | — |
| 翼展 | — | 49.5 cm (19.5 in) |
| 体重 | — | 996.8333333333334 g (35.16 oz) |
| 食性 | Extinct Reunion shelduck; likely fed on grasses, seeds, and aquatic invertebrates near coastal wetlands based … | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … |
| 产卵数 | -- | 4-9 |
| 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.
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
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.
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
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.
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
保护状况
Reunion Shelduck
African 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.
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
About These Birds
Reunion Shelduck
留尼汪麻鸭（Alopochen kervazoi）是一种曾特产于印度洋留尼汪岛的已灭绝麻鸭。属鸭科（Anatidae），仅凭亚化石骨骼和历史记录得知，因人类定居后引进的哺乳动物掠食和猎捕而灭绝。
African Black Duck
A medium-sized dark brown duck with white spots on the back, a dark bill, and orange legs. Found along fast-flowing rocky rivers and streams in Africa. Territorial and monogamous; pairs defend stretches of river. Related to Pacific Black Duck.