Reunion Shelduck vs African Black Duck
Alopochen kervazoi so với Anas sparsa
Side-by-Side Comparison
| Thuộc Tính | Reunion Shelduck | African Black Duck |
|---|---|---|
| Tên Khoa Học | Alopochen kervazoi | Anas sparsa |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Extinct | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | — | 49,5 cm (19.5 in) |
| Khối Lượng | — | 996,8333333333334 g (35.16 oz) |
| Chế Độ Ăn | 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 … |
| Số Trứng | -- | 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.
Tình Trạng Bảo Tồn
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
An extinct shelduck formerly endemic to Réunion Island in the Indian Ocean. Known only from subfossil bones and brief historical records from the 17th century. Went extinct shortly after European colonization. No illustrations or detailed physical description of the living bird is known.
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.