African Black Duck vs Falkland Steamerduck
Anas sparsa 比較対象 Tachyeres brachypterus
Side-by-Side Comparison
| 属性 | African Black Duck | Falkland Steamerduck |
|---|---|---|
| 学名 | Anas sparsa | Tachyeres brachypterus |
| 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) | 49.0 cm (19.3 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 3799.0 g (134.01 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Eats seeds, sedge shoots, and aquatic invertebrates; dabbles in ponds and marshes; diet varies with … |
| 一腹卵数 | 4-9 | 4-12 |
| 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.
Falkland Steamerduck
Exclusive to rocky coasts, sheltered coves, kelp beds, and sea inlets of the Falkland Islands. Flightless; strictly coastal. One of the few bird species entirely endemic to the Falkland Islands.
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.
Falkland Steamerduck
Similar to Magellanic Steamerduck in call quality — harsh, rattling, mechanical. Falkland Island birds' vocalizations adapted for stormy, windswept coastal habitat.
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.
Falkland Steamerduck
Breeds in subarctic boreal ponds of Alaska and Canada; winters coastally from Alaska to California and on the Gulf Coast.
保全状況
African Black Duck
Falkland Steamerduck
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 …
Falkland Steamerduck
Flightless; males gray with white supercilium and orange bill. Breast grayish-brown; flanks with brown mottling. Females brown with white eye-ring. Yellow-olive bill. Endemic to Falkland Islands.
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。
Falkland Steamerduck
フォークランドスティーマーダックはフォークランド諸島に固有の飛べないカモです。大きな体と短い翼が特徴で、水面を翼で漕いで移動します。沿岸の浅海、岩礁地帯に生息し、貝類、甲殻類、海藻を採食します。