Blue-billed Teal vs White-backed Duck
Spatula hottentota 对比 Thalassornis leuconotus
Side-by-Side Comparison
| 属性 | Blue-billed Teal | White-backed Duck |
|---|---|---|
| 学名 | Spatula hottentota | Thalassornis leuconotus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 29.4 cm (11.6 in) | 33.3 cm (13.1 in) |
| 体重 | 269.2 g (9.50 oz) | 704.6666666666666 g (24.86 oz) |
| 食性 | 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 … |
| 产卵数 | 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.
保护状况
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
霍屯都鸭是非洲的一种小型水面鸭，以南非土著霍屯都人命名，主要分布于撒哈拉以南非洲东部和南部。体型小，雄鸟头颈部蓝灰色，体羽棕褐色有细纹；雌鸟褐色。栖息于淡水湖泊、沼泽和湿地，以水生植物和无脊椎动物为食。
White-backed Duck
白背硬尾鸭是非洲唯一的硬尾鸭，主要分布于撒哈拉以南非洲的湖泊和沼泽，以及马达加斯加。体型小，体羽以棕褐色为主，背部白色斑块在飞行时可见，尾羽刚硬。善深潜，主要以睡莲种子和其他水生植物为食。栖息于富有植被的淡水湿地，被列为近危物种。