American Black Duck vs New Zealand Merganser
Anas rubripes 비교 대상 Mergus australis
Side-by-Side Comparison
| 속성 | American Black Duck | New Zealand Merganser |
|---|---|---|
| 학명 | Anas rubripes | Mergus australis |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Extinct |
| 체장 | — | — |
| 날개 폭 | 53.4 cm (21.0 in) | — |
| 체중 | 1211.25 g (42.73 oz) | 898.0 g (31.68 oz) |
| 식성 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Extinct; historically dived for fish and aquatic invertebrates in New Zealand freshwater streams. Diet inferred … |
| 산란 수 | 1-17 | -- |
| 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.
New Zealand Merganser
Extinct (EX). No recordings exist. This flightless New Zealand merganser likely gave grunting, nasal calls similar to the Red-breasted Merganser based on skull morphology and taxonomy.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
New Zealand Merganser
Formerly endemic to South Island and Stewart Island, New Zealand. Extinct since the 1900s.
보전 상태
American Black Duck
New Zealand 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 …
New Zealand Merganser
Both sexes were dark brown overall; male had greenish-black gloss on head with slight crest, whitish barring on wings; female paler brown with rufous-tinged head and whitish throat.
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.
New Zealand Merganser
중형 오리로 체장 약 55cm이며, 갈색과 흰색이었다. 뉴질랜드 오클랜드 제도에 서식하던 종으로 1902년경 멸종하였다. 잠수하여 어류와 수생 무척추동물을 먹었을 것으로 추정된다. 멸종 종이다.