African Black Duck vs White-backed Duck
Anas sparsa 对比 Thalassornis leuconotus
Side-by-Side Comparison
| 属性 | African Black Duck | White-backed Duck |
|---|---|---|
| 学名 | Anas sparsa | Thalassornis leuconotus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 49.5 cm (19.5 in) | 33.3 cm (13.1 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 704.6666666666666 g (24.86 oz) |
| 食性 | -- | -- |
| 产卵数 | 4-9 | 4-10 |
| 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.
White-backed Duck
Freshwater lakes, ponds, and swamps with abundant floating aquatic vegetation, especially water lilies, in sub-Saharan Africa and Madagascar. Prefers shallow sheltered water with emergent vegetation for cover.
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.
White-backed Duck
Soft, low whistles and hissing sounds. The White-backed Duck is relatively quiet compared to whistling-ducks. Alarm call is a low 'peep'. Mostly heard at night.
保护状况
African Black Duck
White-backed 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 …
White-backed Duck
Heavily mottled and barred brown and buff overall. Diagnostic white back patch visible in flight. Head brown with whitish face and chin. Stiff tail held erect. Sexes similar; stiff-tail diving …
About These Birds
African Black Duck
A medium-sized dark brown duck with white spots on the back, a dark bill, and orange legs. Found along fast-flowing rocky rivers and streams in Africa. Territorial and monogamous; pairs defend stretches of river. Related to Pacific Black Duck.
White-backed Duck
白背硬尾鸭是非洲唯一的硬尾鸭，主要分布于撒哈拉以南非洲的湖泊和沼泽，以及马达加斯加。体型小，体羽以棕褐色为主，背部白色斑块在飞行时可见，尾羽刚硬。善深潜，主要以睡莲种子和其他水生植物为食。栖息于富有植被的淡水湿地，被列为近危物种。