African Black Duck vs Black Scoter
Anas sparsa so với Melanitta americana
Side-by-Side Comparison
| Thuộc Tính | African Black Duck | Black Scoter |
|---|---|---|
| Tên Khoa Học | Anas sparsa | Melanitta americana |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Least Concern | Near Threatened |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 49,5 cm (19.5 in) | 44,0 cm (17.3 in) |
| Khối Lượng | 996,8333333333334 g (35.16 oz) | 1046,1 g (36.90 oz) |
| Chế Độ Ăn | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Dives for molluscs, particularly mussels and clams, in coastal waters. Takes aquatic insects and plant … |
| Số Trứng | 4-9 | 5-11 |
| Population Trend | — | — |
Habitat Comparison
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
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.
Black Scoter
Male produces a low, melodious whistle; female gives a harsh, grating call. Closely related to Common Scoter; voice very similar; heard on North American Pacific and Atlantic coasts in winter.
Geographic Range & Migration
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
Black Scoter
Breeds in boreal forests and tundra of Alaska and northern Canada. Winters along Pacific and Atlantic coasts south to Baja California and Florida.
Tình Trạng Bảo Tồn
African Black Duck
Black Scoter
How to Tell Them Apart
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 …
Black Scoter
Male is pure glossy black throughout with a prominent bright orange-yellow knob at bill base. Female is dark sooty-brown with pale buff cheeks and foreneck contrasting with darker cap and …
About These Birds
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.
Black Scoter
A medium-sized sea duck (~1 kg) in family Anatidae, males entirely black with a bold orange-yellow knob at the bill base. Breeds on boreal and tundra lakes of North America and eastern Russia; winters coastally. Dives for mollusks and crustaceans. Near Threatened following population declines linked to habitat loss on breeding grounds.