American Black Duck vs Hawaiian Duck
Anas rubripes 비교 대상 Anas wyvilliana
Side-by-Side Comparison
| 속성 | American Black Duck | Hawaiian Duck |
|---|---|---|
| 학명 | Anas rubripes | Anas wyvilliana |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Vulnerable |
| 체장 | — | — |
| 날개 폭 | 53.4 cm (21.0 in) | 44.0 cm (17.3 in) |
| 체중 | 1211.25 g (42.73 oz) | 573.25 g (20.22 oz) |
| 식성 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Fish-diving duck of South American rivers; uses serrated bill to catch fish and aquatic invertebrates; … |
| 산란 수 | 1-17 | 9-13 |
| 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.
Hawaiian Duck
Freshwater marshes, rivers, reservoirs, and taro fields on Kauai and other Hawaiian islands. Nests in dense vegetation near water. Threatened by hybridization with domestic or feral Mallards.
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.
Hawaiian Duck
Female produces a raspy, descending quacking series; male gives a soft, nasal sound. Calls similar to Mallard but higher-pitched; alarm is a rapid-fire quacking rattle.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Hawaiian Duck
Ranges across sub-Saharan Africa in open grasslands and wetland edges. Locally nomadic following seasonal rainfall patterns.
보전 상태
American Black Duck
Hawaiian Duck
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 …
Hawaiian Duck
Mottled brown plumage; males may show slight green gloss on head but reduced compared to Mallard. Iridescent blue-purple speculum with white borders. Orange bill. Females similar to males; pale buff …
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.
Hawaiian Duck
하와이 오리 또는 콜로아 마올리는 하와이 제도에서만 서식하는 멸종위기종 오리입니다. 말라드와 형태학적으로 유사하지만 유전적으로 구별되며, 서식지 보호와 번식 프로그램이 진행 중입니다.