African Black Duck vs Marbled Duck
Anas sparsa 比較対象 Marmaronetta angustirostris
Side-by-Side Comparison
| 属性 | African Black Duck | Marbled Duck |
|---|---|---|
| 学名 | Anas sparsa | Marmaronetta angustirostris |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | — | — |
| 翼開長 | 49.5 cm (19.5 in) | 40.1 cm (15.8 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 422.5 g (14.90 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Dives for molluscs, crustaceans, and small fish; diet dominated by hard-shelled benthic invertebrates in coastal … |
| 一腹卵数 | 4-9 | 5-20 |
| Population Trend | — | — |
Habitat Comparison
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.
Marbled Duck
Shallow densely vegetated freshwater and brackish marshes, rice paddies, and lagoons in the Mediterranean basin, Middle East, and Central Asia. Winters in Africa and South Asia. Dependent on emergent wetland vegetation.
Song & Call Comparison
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.
Marbled Duck
Male gives a low, guttural chuckling; female produces a nasal, rattling quack. Calls are relatively quiet for a duck; the chuckling male call is unusual among Eurasian and North African …
Geographic Range & Migration
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
Marbled Duck
Breeds in the high Arctic; winters on the open Atlantic Ocean and along coastlines from Labrador to the Gulf of Mexico.
保全状況
African Black Duck
Marbled Duck
How to Tell Them Apart
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 …
Marbled Duck
Pale sandy-buff plumage with bold white spots throughout; distinctive marbled pattern. Dark eye patch forming mask. Pale face and throat. No iridescent speculum. Gray bill; gray legs. Sexes similar. Mediterranean …
About These Birds
African Black Duck
アフリカンブラックダックはサハラ以南のアフリカの急流河川に生息する特殊なカモです。暗褐色の羽毛と白い斑点が特徴で、水流の速い清澄な渓流を好みます。繁殖期には縄張り意識が強く、ペアで生活します。急流の水生昆虫や甲殻類を主食とします。
Marbled Duck
マーブルダックは地中海地方から中央アジアにかけて分布する潜水性カモです。白と褐色のまだら模様の羽毛が特徴で、嘴が細長いです。浅い湿地、葦原、塩湖に生息し、水草、藻類、無脊椎動物を採食します。生息地の減少で個体数が大幅に減少しています。