American Black Duck vs Eurasian Wigeon
Anas rubripes 比較対象 Mareca penelope
Side-by-Side Comparison
| 属性 | American Black Duck | Eurasian Wigeon |
|---|---|---|
| 学名 | Anas rubripes | Mareca penelope |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 53.4 cm (21.0 in) | 50.1 cm (19.7 in) |
| 体重 | 1211.25 g (42.73 oz) | 783.75 g (27.65 oz) |
| 食性 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Feeds on seeds, aquatic plants, and invertebrates in shallow ponds; broadly omnivorous and seasonally variable. |
| 一腹卵数 | 1-17 | 6-12 |
| 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.
Eurasian Wigeon
Breeds on boreal and subarctic lakes and bogs across Eurasia from Iceland east to Siberia. Winters in huge numbers on estuaries, lakes, and coastal grasslands in western Europe and South and Southeast Asia.
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.
Eurasian Wigeon
Male produces a clear, ringing whee-oo whistle; female gives a low, guttural purr. The male's bright, piping call is the classic sound of European winter estuaries and flocks.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Eurasian Wigeon
Resident in New Zealand's main islands and some offshore islands. Non-migratory; inhabits rivers, lakes, and estuaries.
保全状況
American Black Duck
Eurasian Wigeon
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 …
Eurasian Wigeon
Males have chestnut head with creamy-yellow forehead blaze; pink-buff breast; gray flanks; white belly. White forewing patch conspicuous in flight. Females rufous-brown. Compact with small bill. Dimorphic.
About These Birds
American Black Duck
北米東部の湿地、沼、河川に生息するカモ（体長53〜61cm）。全体的に暗褐色でマガモの雌に似るが、嘴の色や翼鏡の色が異なる。Anas rubripes（アメリカクロガモ）は海岸の塩性湿地から内陸の淡水域まで幅広く利用し、マガモとの雑種が多く観察される。Anatidae科。
Eurasian Wigeon
ユーラシア大陸原産のヒドリガモ。雄は赤褐色の頭と黄色い額が特徴的。体長42〜50cm。湖、川、湿地に生息し、草地でも採食する。主に植物の葉や茎、水草を食べる草食性。ヨーロッパ・アジアで繁殖し南へ渡る。低危険種。