African Black Duck vs Red-crested Pochard
Anas sparsa 比較対象 Netta rufina
Side-by-Side Comparison
| 属性 | African Black Duck | Red-crested Pochard |
|---|---|---|
| 学名 | Anas sparsa | Netta rufina |
| 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) | 51.7 cm (20.4 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 1087.5 g (38.36 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Dives for molluscs and aquatic invertebrates in coastal habitats; diet dominated by hard-shelled benthic invertebrates. |
| 一腹卵数 | 4-9 | 6-14 |
| 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.
Red-crested Pochard
Large freshwater and brackish lakes, reservoirs, river deltas, and coastal lagoons across southern Europe and Central Asia. Winters on large open water bodies in southern Europe, the Middle East, and South Asia.
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.
Red-crested Pochard
Male emits a harsh, rasping errr note; female gives a loud, quacking series. The raspy male call is distinctive among pochards; alarm is an emphatic, repeated series on Eurasian lakes.
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.
Red-crested Pochard
Breeds across Arctic and subarctic North America; winters broadly across the interior and coastal United States.
保全状況
African Black Duck
Red-crested Pochard
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 …
Red-crested Pochard
Males have rounded orange-rufous head with bright red bill; black breast, neck and undertail; white flanks; brown back. Females dark brown with pale cheeks. Bold white wing stripe in flight. …
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。
Red-crested Pochard
南ヨーロッパ・中央アジアの湖沼で繁殖する大型の潜水ガモ（体長53〜57cm）。雄の赤みがかった褐色の頭とオレンジの嘴が特徴的。Netta rufina（アカハジロ）は水深の浅い湖で水草の根や茎を食べ、カモメが多い環境でも見られる。ヨーロッパでは越冬数が増加傾向にある。Anatidae科。