Blue-billed Teal vs White-backed Duck
Spatula hottentota so với Thalassornis leuconotus
Side-by-Side Comparison
| Thuộc Tính | Blue-billed Teal | White-backed Duck |
|---|---|---|
| Tên Khoa Học | Spatula hottentota | Thalassornis leuconotus |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 29,4 cm (11.6 in) | 33,3 cm (13.1 in) |
| Khối Lượng | 269,2 g (9.50 oz) | 704,6666666666666 g (24.86 oz) |
| Chế Độ Ăn | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … | Eats aquatic plants, grasses, and seeds; large tropical swan grazing on lake margins and floating … |
| Số Trứng | 5-12 | 4-10 |
| 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-backed Duck
Freshwater lakes, ponds, and swamps with abundant floating aquatic vegetation, especially water lilies, in sub-Saharan Africa and Madagascar. Prefers shallow sheltered water with emergent vegetation for cover.
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-backed Duck
Soft, low whistles and hissing sounds. The White-backed Duck is relatively quiet compared to whistling-ducks. Alarm call is a low 'peep'. Mostly heard at night.
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-backed Duck
Breeds in subarctic Canada; winters along the Atlantic coast from New England to Florida and on the Gulf Coast.
Tình Trạng Bảo Tồn
Blue-billed Teal
White-backed Duck
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-backed Duck
Heavily mottled and barred brown and buff overall. Diagnostic white back patch visible in flight. Head brown with whitish face and chin. Stiff tail held erect. Sexes similar; stiff-tail diving …
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-backed Duck
A small compact brown-barred diving duck with a distinctive white back visible in flight and a large dark-blotched bill. Shy and easily overlooked among floating aquatic vegetation. An expert diver, feeding on water-lily seeds and tubers in African freshwater wetlands.