Blue-billed Teal vs White-headed Steamerduck
Spatula hottentota 比較対象 Tachyeres leucocephalus
Side-by-Side Comparison
| 属性 | Blue-billed Teal | White-headed Steamerduck |
|---|---|---|
| 学名 | Spatula hottentota | Tachyeres leucocephalus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 29.4 cm (11.6 in) | 55.0 cm (21.7 in) |
| 体重 | 269.2 g (9.50 oz) | 3250.0 g (114.64 oz) |
| 食性 | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … | Dabbles for aquatic invertebrates, seeds, and plant material in shallow water; diet shifts more toward … |
| 一腹卵数 | 5-12 | 3-6 |
| 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.
White-headed Steamerduck
Rocky coastal shores, sea channels, and sheltered bays along the Patagonian coast of Chubut Province, Argentina. Flightless; strictly coastal. Nests on rocky headlands. Very limited geographic range.
Song & Call Comparison
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.
White-headed Steamerduck
A deep, rattling call from Patagonian coastal habitat. VU status; calls similar to Magellanic Steamerduck but possibly subtly distinct. Vocalizations in wild remain understudied.
Geographic Range & Migration
Blue-billed Teal
Breeds in Arctic and subarctic Eurasia; winters at sea in the North Atlantic and from western Europe to eastern Africa.
White-headed Steamerduck
Breeds across northern Canada in boreal and sub-Arctic lakes; winters on the Atlantic and Gulf coasts of North America.
保全状況
Blue-billed Teal
White-headed Steamerduck
How to Tell Them Apart
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.
White-headed Steamerduck
Flightless. Males have white head and neck contrasting with dark gray-brown body; orange bill. Females brown with white facial markings and less contrasting head. Restricted to Chubut, Argentina coast.
About These Birds
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.
White-headed Steamerduck
チョエノスステームアーダックはアルゼンチン南部のチョエノス群島に固有の飛べないカモです。白い頭部と大きな体が特徴的です。沿岸の島嶼の岩礁地帯に生息し、貝類、甲殻類、海藻を採食します。フォークランドスティーマーダックに近縁です。