Green-winged Teal vs African Black Duck
Anas carolinensis 对比 Anas sparsa
Side-by-Side Comparison
| 属性 | Green-winged Teal | African Black Duck |
|---|---|---|
| 学名 | Anas carolinensis | Anas sparsa |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 35.0 cm (13.8 in) | 49.5 cm (19.5 in) |
| 体重 | 330.5 g (11.66 oz) | 996.8333333333334 g (35.16 oz) |
| 食性 | Eats aquatic invertebrates, molluscs, and seeds; dives in shallow water; diet shifts between invertebrates and … | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … |
| 产卵数 | -- | 4-9 |
| Population Trend | — | — |
Habitat Comparison
Green-winged Teal
Breeds on boreal and subarctic wetlands across North America. Winters on freshwater marshes, coastal estuaries, rice paddies, and shallow wetlands from the southern United States to Central America and the Caribbean.
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Song & Call Comparison
Green-winged Teal
Male produces a high, clear krick call; female gives a subdued quack. Closely related to Common Teal; male's ringing call punctuates North American freshwater marshes in spring.
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
Geographic Range & Migration
Green-winged Teal
Breeds in Arctic regions; winters at sea across the North Pacific, from Alaska to Japan and northern California.
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
保护状况
Green-winged Teal
African Black Duck
How to Tell Them Apart
Green-winged Teal
Males have chestnut head with iridescent green eye patch; gray body; vertical white shoulder stripe (vs. horizontal in Common Teal). Cream and black undertail. Females mottled brown. Smallest North American …
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
About These Birds
Green-winged Teal
美洲绿翅鸭（Anas carolinensis）是一种小型戏水鸭，是欧洲绿翅鸭在北美洲的对应种。雄鸟头部栗色，眼圈周围具闪光绿色斑块。属鸭科（Anatidae），在北美繁殖，越冬至中美洲和南美洲。
African Black Duck
A medium-sized dark brown duck with white spots on the back, a dark bill, and orange legs. Found along fast-flowing rocky rivers and streams in Africa. Territorial and monogamous; pairs defend stretches of river. Related to Pacific Black Duck.