White-faced Whistling-duck vs Blue-billed Teal
Dendrocygna viduata 对比 Spatula hottentota
Side-by-Side Comparison
| 属性 | White-faced Whistling-duck | Blue-billed Teal |
|---|---|---|
| 学名 | Dendrocygna viduata | Spatula hottentota |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 42.9 cm (16.9 in) | 29.4 cm (11.6 in) |
| 体重 | 689.5 g (24.32 oz) | 269.2 g (9.50 oz) |
| 食性 | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes eating saltmarsh grasses and … | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … |
| 产卵数 | 4-16 | 5-12 |
| Population Trend | — | — |
Habitat Comparison
White-faced Whistling-duck
Freshwater lakes, marshes, rice paddies, flooded fields, and slow-moving rivers in sub-Saharan Africa and tropical South America. Tolerates a wide range of modified wetlands. Nomadic, following water availability.
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
White-faced Whistling-duck
A clear, 3-syllable whistle 'wee-wee-WEE' — the origin of 'whistling-duck'. Given in noisy flocks during flight. Also gives a softer 'de-de-de' contact call on water.
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
White-faced Whistling-duck
Found in floodplains and wetlands of the Llanos in Venezuela and eastern Colombia. Sedentary and locally nomadic in wet savannas.
Blue-billed Teal
Breeds in Arctic and subarctic Eurasia; winters at sea in the North Atlantic and from western Europe to eastern Africa.
保护状况
White-faced Whistling-duck
Blue-billed Teal
How to Tell Them Apart
White-faced Whistling-duck
Distinctive white face and throat contrasting with black hindneck. Breast chestnut; sides and flanks barred black and white. Back brown. Long gray legs. Sexes identical; upright whistling-duck posture.
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
White-faced Whistling-duck
白脸树鸭分布于非洲撒哈拉以南和南美洲中部至北部地区，是数量最多的树鸭之一。面部白色，额和颈部黑色，体羽棕褐色，腹部黑白相间横纹醒目。常栖于淡水湖泊、河流和湿地，以水生植物和昆虫为食。常结数千只的大群活动，鸣声响亮。
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。