African Black Duck vs Swan Goose
Anas sparsa 비교 대상 Anser cygnoid
Side-by-Side Comparison
| 속성 | African Black Duck | Swan Goose |
|---|---|---|
| 학명 | Anas sparsa | Anser cygnoid |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Endangered |
| 체장 | — | — |
| 날개 폭 | 49.5 cm (19.5 in) | 84.4 cm (33.2 in) |
| 체중 | 996.8333333333334 g (35.16 oz) | 3343.75 g (117.95 oz) |
| 식성 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Herbivore; grazes aquatic plants and grasses at wetland margins; takes invertebrates in spring; diet shifts … |
| 산란 수 | 4-9 | 4-8 |
| 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.
Swan Goose
Breeds on steppe lakes, rivers, and meadows in Mongolia, Siberia, and northeastern China. Winters in eastern China's Yangtze River floodplain and coastal wetlands. Wild populations critically small.
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.
Swan Goose
A deep, resonant 'honk'; less frequently heard than Greylag. The EN status reflects serious population decline; vocalizations are considered similar to Greylag Goose.
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.
Swan Goose
Breeds in the tundra and boreal zones of Alaska and Canada; winters on the Pacific coast from British Columbia to California.
보전 상태
African Black Duck
Swan Goose
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 …
Swan Goose
Long neck with rich chestnut hindneck stripe. Forehead and crown dark brown; face and throat whitish. Upperparts grayish-brown; underparts pale. Long black bill. Pink legs. Ancestor of Chinese domestic geese.
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.
Swan Goose
백조 기러기는 중앙아시아와 동아시아에 서식하는 대형 기러기로, 국내 기러기(중국 기러기)의 조상입니다. 긴 목과 독특한 부리 기부의 혹이 특징이며, 이주 중 큰 무리를 이룹니다.