Mauritius Duck vs Black-headed Duck
Anas theodori 비교 대상 Heteronetta atricapilla
Side-by-Side Comparison
| 속성 | Mauritius Duck | Black-headed Duck |
|---|---|---|
| 학명 | Anas theodori | Heteronetta atricapilla |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Extinct | Least Concern |
| 체장 | — | — |
| 날개 폭 | — | 34.7 cm (13.7 in) |
| 체중 | — | 528.5 g (18.64 oz) |
| 식성 | Extinct; fed on freshwater invertebrates and aquatic plants; diet inferred from bill morphology and contemporary … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 산란 수 | -- | 2 |
| Population Trend | — | — |
Habitat Comparison
Mauritius Duck
Historically restricted to the Mascarene Islands (Mauritius and Réunion) in the Indian Ocean. Now extinct. Presumably inhabited freshwater wetlands and coastal areas before human colonization.
Song & Call Comparison
Mauritius Duck
Extinct (EX). No recordings exist. As a small island Anas duck, likely produced a quiet quacking call. Closest living relatives among insular Indian Ocean teals give soft, nasal notes.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
Mauritius Duck
Breeds in Arctic tundra ponds of Canada; winters along the Atlantic and Gulf coasts of the southern United States.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
보전 상태
Mauritius Duck
Black-headed Duck
How to Tell Them Apart
Mauritius Duck
Extinct Mascarene duck known only from subfossil bones. Plumage unrecorded; presumably brown dabbling duck plumage typical of Anas. Likely flightless or near-flightless; extirpated after European settlement of Mauritius.
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
Mauritius Duck
모리셔스 오리는 마스카렌 제도의 모리셔스와 레위니옹에 서식했던 날지 못하는 오리였으나, 17-18세기에 인간 활동으로 인해 멸종되었습니다. 하위아화석 기록에서만 알려진 종입니다.
Black-headed Duck
검은머리오리(Heteronetta atricapilla)는 남아메리카산 약 530g의 소형 잠수 오리로, 오리과의 유일한 탁란성 종이다. 다른 수조류 둥지에 알을 낳는다.