African Black Duck vs Gadwall
Anas sparsa 비교 대상 Mareca strepera
Side-by-Side Comparison
| 속성 | African Black Duck | Gadwall |
|---|---|---|
| 학명 | Anas sparsa | Mareca strepera |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 49.5 cm (19.5 in) | 50.3 cm (19.8 in) |
| 체중 | 996.8333333333334 g (35.16 oz) | 857.5 g (30.25 oz) |
| 식성 | -- | -- |
| 산란 수 | 4-9 | 5-15 |
| 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.
Gadwall
Freshwater lakes, reservoirs, marshes, and rivers with emergent vegetation across Eurasia and North America. Winters on large open wetlands and coastal estuaries. Range and population increasing in Europe.
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.
Gadwall
Male utters a soft, nasal nheck note; female produces a series of descending, quacking notes. Both sexes are relatively quiet; female's quacking is softer and less strident than a Mallard.
보전 상태
African Black Duck
Gadwall
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 …
Gadwall
Males have finely vermiculated gray-brown plumage with black rump and undertail. White speculum patch diagnostic in flight. Females mottled brown like Mallard but smaller and with orange-sided bill. Subtle but …
About These Birds
African Black Duck
아프리카 검정 오리는 사하라 이남 아프리카의 산간 하천과 개울에 서식하는 중간 크기의 오리입니다. 어두운 갈색 깃털과 흰색 반점이 특징이며, 빠르게 흐르는 물에 적응되어 있습니다.
Gadwall
중간 크기의 물오리로 체장 46–56cm이며, 수컷은 갈색 회색 깃털에 검은 꽁지, 흰색 날개 반점이 있다. 유라시아와 북아메리카의 얕은 담수 습지와 호수에 서식한다. 잡식성으로 수생식물, 씨앗, 소형 무척추동물을 먹는다. 관심 필요 종이다.