American Black Duck vs Brazilian Merganser
Anas rubripes 비교 대상 Mergus octosetaceus
Side-by-Side Comparison
| 속성 | American Black Duck | Brazilian Merganser |
|---|---|---|
| 학명 | Anas rubripes | Mergus octosetaceus |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Critically Endangered |
| 체장 | — | — |
| 날개 폭 | 53.4 cm (21.0 in) | 39.2 cm (15.4 in) |
| 체중 | 1211.25 g (42.73 oz) | 827.6666666666666 g (29.20 oz) |
| 식성 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| 산란 수 | 1-17 | 5-8 |
| 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.
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.
Brazilian Merganser
Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
보전 상태
American Black Duck
Brazilian Merganser
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 …
Brazilian Merganser
Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.
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.
Brazilian Merganser
중형 물오리로 체장 약 55cm이며, 수컷은 광택 있는 녹색 머리, 흰 몸통, 빨간 부리를 갖는다. 남아메리카 내륙 강과 청정 하천에 서식한다. 잠수하여 어류를 먹는다. 위기 상태이다.