African Black Duck vs Kelp Goose
Anas sparsa so với Chloephaga hybrida
Side-by-Side Comparison
| Thuộc Tính | African Black Duck | Kelp Goose |
|---|---|---|
| Tên Khoa Học | Anas sparsa | Chloephaga hybrida |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 49,5 cm (19.5 in) | 71,6 cm (28.2 in) |
| Khối Lượng | 996,8333333333334 g (35.16 oz) | 2735,0 g (96.47 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 4-9 | 3-7 |
| 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.
Kelp Goose
Rocky wave-washed shores, sea channels, and kelp-fringed coasts of Patagonian Chile and Argentina south to Tierra del Fuego, and the Falkland Islands. Strictly coastal; almost never moves inland.
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.
Kelp Goose
A loud, nasal 'honk'. Male is mostly white and gives sharper calls; female is dark and gives softer, lower honks. Coastal Patagonian and Falklands habitat; highly vocal.
Tình Trạng Bảo Tồn
African Black Duck
Kelp Goose
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 …
Kelp Goose
Extreme dimorphism. Males entirely white with yellow bill and legs. Females dark brown barred white overall; yellow legs. Coastal species of rocky shores. Sexes so different they were once considered …
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.
Kelp Goose
A sheldgoose with stark sexual dimorphism: males are entirely white; females are dark brown with white belly and barred flanks. Found exclusively on rocky wave-washed shorelines where it feeds almost entirely on kelp and green algae. Endemic to Patagonian coastline and Falkland Islands.