Smew vs Blue-billed Teal
Mergellus albellus 比較対象 Spatula hottentota
Side-by-Side Comparison
| 属性 | Smew | Blue-billed Teal |
|---|---|---|
| 学名 | Mergellus albellus | Spatula hottentota |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 37.5 cm (14.8 in) | 29.4 cm (11.6 in) |
| 体重 | 658.75 g (23.24 oz) | 269.2 g (9.50 oz) |
| 食性 | Dives for small fish, aquatic insects, and crustaceans in freshwater and coastal habitats. Uses serrated … | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … |
| 一腹卵数 | 5-11 | 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
Smew
Male gives a soft, crow-like krr note; female produces a grating, rasping call. Both sexes are relatively quiet; the male's harsh, crow-like call is surprisingly low for such a small …
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
Smew
Breeds in boreal forests of northern Europe and Siberia. Winters on large lakes and coasts from western Europe east to Japan and China.
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
Smew
Blue-billed Teal
How to Tell Them Apart
Smew
Male is largely white with black eye patch, black lines on back, and fine black lines on flanks creating a cracked-ice pattern. Female has chestnut-red head, white cheeks, and grey …
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
Smew
ミコアイサはユーラシア北部の針葉樹林帯に繁殖し、東アジアで越冬する潜水性カモです。雄は白い体に黒い模様が美しいです。日本では冬鳥として全国の湖沼、池、河川に飛来します。木の洞に営巣し、魚、水生昆虫、甲殻類を潜って採食します。
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.