Masked Duck vs Blue-billed Teal
Nomonyx dominicus 比較対象 Spatula hottentota
Side-by-Side Comparison
| 属性 | Masked Duck | Blue-billed Teal |
|---|---|---|
| 学名 | Nomonyx dominicus | Spatula hottentota |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 27.6 cm (10.9 in) | 29.4 cm (11.6 in) |
| 体重 | 361.0 g (12.73 oz) | 269.2 g (9.50 oz) |
| 食性 | Dives and dabbles for aquatic seeds, plant matter, and invertebrates in freshwater marshes and ponds … | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … |
| 一腹卵数 | 4-6 | 5-12 |
| Population Trend | — | — |
Habitat Comparison
Blue-billed Teal
Freshwater lakes, marshes, pans, and flooded grasslands across sub-Saharan Africa from Senegal and Sudan south to the Cape. Nomadic; follows seasonal rains. Common but easily overlooked among reed beds.
Song & Call Comparison
Masked Duck
Male emits a soft, dove-like cooing note; female gives a harsh, emphatic quack. The male's gentle, almost melodic cooing is surprising for a stiff-tail; heard in tropical American marshes.
Blue-billed Teal
Male utters a soft, teal-like peep; female gives a muted quack. Pairs call quietly in dense papyrus; soft contact calls help birds maintain proximity in thick African marsh vegetation.
Geographic Range & Migration
Masked Duck
Resident from Mexico and the Caribbean south through Central America to northern South America. Found in lowland freshwater marshes and lagoons.
Blue-billed Teal
Breeds in Arctic and subarctic Eurasia; winters at sea in the North Atlantic and from western Europe to eastern Africa.
保全状況
Masked Duck
Blue-billed Teal
How to Tell Them Apart
Masked Duck
Male is rich rufous-chestnut with black mask from forehead to face, boldly spotted black on upperparts; blue bill. Female is streaked buff and brown with two dark facial stripes crossing …
Blue-billed Teal
Small; males have pale blue-gray bill contrasting with brown-gray body. Head finely spotted; underparts barred brown and white. Males show powder-blue forewing in flight. Females browner. African marsh species.
About These Birds
Masked Duck
マスクドダックは中南米に分布するカモです。雄は黒い顔の模様と青い嘴が特徴的で、尾を立てる習性があります。深い葦原に覆われた湿地に隠れるように生活し、観察が難しいです。水草の種子や無脊椎動物を採食します。
Blue-billed Teal
A small dark teal with blue-grey bill and legs, brown-streaked plumage, and fine pale spotting on the flanks. The most widespread teal in sub-Saharan Africa. Found on freshwater lakes and marshes. Highly nomadic; follows seasonal rainfall. Swims low in the water like a pochard.