African Black Duck vs Crested Duck
Anas sparsa 比較対象 Lophonetta specularioides
Side-by-Side Comparison
| 属性 | African Black Duck | Crested Duck |
|---|---|---|
| 学名 | Anas sparsa | Lophonetta specularioides |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 49.5 cm (19.5 in) | 53.8 cm (21.2 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 941.3833333333333 g (33.21 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Feeds on seeds and aquatic invertebrates; dabbles in ponds and marshes; diet more invertebrate-heavy in … |
| 一腹卵数 | 4-9 | 5-8 |
| 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.
Crested Duck
Fast-flowing Andean rivers, lakes, and puna wetlands from sea level to 4,500 m in Peru, Bolivia, Chile, Argentina, and the Falkland Islands. Occupies both coastal and high-altitude wetland habitats.
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.
Crested Duck
Produces a harsh, rattling call and loud hissing alarm notes. Both sexes vocalize with grating, nasal croaking sounds echoing across Andean rocky shores and rivers.
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.
Crested Duck
Breeds across Eurasia; winters in sub-Saharan Africa. One of the most abundant Palearctic ducks on the African wintering grounds.
保全状況
African Black Duck
Crested 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 …
Crested Duck
Brown body with dark streaking; long pointed crest on hindcrown. Face and throat pale with dark eye patch. Iridescent purple-bronze speculum bordered white. Bill and legs grayish. Sexes similar. Andean …
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。
Crested Duck
クレステッドダックは南米のアンデス山脈と南端のパタゴニアに分布するカモです。目の後ろの短い冠羽が特徴的です。高山の湖から南極近くの海岸まで幅広い環境に生息し、水草、藻類、無脊椎動物を採食します。