American Black Duck vs Swan Goose
Anas rubripes 비교 대상 Anser cygnoid
Side-by-Side Comparison
| 속성 | American Black Duck | Swan Goose |
|---|---|---|
| 학명 | Anas rubripes | Anser cygnoid |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Endangered |
| 체장 | — | — |
| 날개 폭 | 53.4 cm (21.0 in) | 84.4 cm (33.2 in) |
| 체중 | 1211.25 g (42.73 oz) | 3343.75 g (117.95 oz) |
| 식성 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Herbivore; grazes aquatic plants and grasses at wetland margins; takes invertebrates in spring; diet shifts … |
| 산란 수 | 1-17 | 4-8 |
| Population Trend | — | — |
Habitat Comparison
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
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
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
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
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
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
American Black Duck
Swan Goose
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
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
American Black Duck
아메리카 검정 오리는 북아메리카 동부에 서식하는 중간 크기의 오리로, 말라드와 매우 유사하지만 전체적으로 더 어둡고 뚜렷한 보라색 날개 거울을 가지고 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.