African Black Duck vs Yellow-billed Duck
Anas sparsa 比較対象 Anas undulata
Side-by-Side Comparison
| 属性 | African Black Duck | Yellow-billed Duck |
|---|---|---|
| 学名 | Anas sparsa | Anas undulata |
| 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) | 48.1 cm (18.9 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 907.6666666666666 g (32.02 oz) |
| 食性 | -- | Dives for fish, frogs, and aquatic invertebrates; uses serrated bill to grip prey; diet shifts … |
| 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.
Yellow-billed Duck
Freshwater lakes, rivers, marshes, and dams across eastern and southern Africa from Ethiopia and Uganda south to the Cape. Tolerates agricultural impoundments and urban wetlands. Largely sedentary.
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.
Yellow-billed Duck
Female gives a loud, descending quacking series; male utters a soft, raspy rehb note. The female's strong quacking call is the dominant sound at sub-Saharan African wetlands.
Geographic Range & Migration
African Black Duck
Yellow-billed Duck
Found across sub-Saharan Africa from Senegal to Ethiopia and south to South Africa. Sedentary in freshwater wetlands.
保全状況
African Black Duck
Yellow-billed 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 …
Yellow-billed Duck
Brown body with scaly pale-edged feathers; head brown with paler face and throat. Diagnostic bright yellow bill with black central stripe. Iridescent green-and-black speculum with white borders. Sexes similar.
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。
Yellow-billed Duck
イエローカモはアフリカ東南部に生息するカモで、黄色い嘴が最大の特徴です。内陸の湖、沼地、川、ダムに生息し、水草、種子、無脊椎動物などを採食します。通常は小さな群れを作りますが、乾燥期には数百羽の大群になることもあります。