American Black Duck vs Mauritius Duck
Anas rubripes เปรียบเทียบกับ Anas theodori
Side-by-Side Comparison
| คุณสมบัติ | American Black Duck | Mauritius Duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Anas rubripes | Anas theodori |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Extinct |
| ความยาว | — | — |
| กว้างปีก | 53.4 cm (21.0 in) | — |
| น้ำหนัก | 1211.25 g (42.73 oz) | — |
| อาหาร | -- | -- |
| จำนวนไข่ | 1-17 | -- |
| Population Trend | — | — |
Habitat Comparison
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Mauritius Duck only
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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.
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
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.
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.
สถานะการอนุรักษ์
American Black Duck
Mauritius 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 …
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.
About These Birds
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.
Mauritius Duck
An extinct duck known from subfossil bones found on Mauritius and Réunion. Closely related to the Grey Teal. Went extinct after European settlement of the Mascarene Islands in the 17th century due to hunting and introduced predators.