African Black Duck vs Blue-winged Goose
Anas sparsa เปรียบเทียบกับ Cyanochen cyanoptera
Side-by-Side Comparison
| คุณสมบัติ | African Black Duck | Blue-winged Goose |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Anas sparsa | Cyanochen cyanoptera |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Near Threatened |
| ความยาว | — | — |
| กว้างปีก | 49.5 cm (19.5 in) | 65.2 cm (25.7 in) |
| น้ำหนัก | 996.8333333333334 g (35.16 oz) | 1796.25 g (63.36 oz) |
| อาหาร | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Eats aquatic plants, seeds, and invertebrates; dabbles in shallow ponds; diet shifts toward invertebrates in … |
| จำนวนไข่ | 4-9 | 4-12 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
African Black Duck only
Blue-winged Goose only
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.
Blue-winged Goose
Alpine and subalpine grasslands, riverbanks, and marshy meadows at 2,800–4,200 m on the Ethiopian Highlands. Grazes along stream and river margins. Strongly tied to highland wetlands near cold mountain streams.
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.
Blue-winged Goose
A soft, nasal bleating call from Ethiopian highland wetlands. The NT status and restricted Afroalpine range mean vocalizations are poorly documented in systematic detail.
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.
Blue-winged Goose
Breeds in northern prairie wetlands; winters along the Atlantic and Gulf coasts of the United States.
สถานะการอนุรักษ์
African Black Duck
Blue-winged 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 …
Blue-winged Goose
Mostly dull gray-brown; head paler gray. Distinctive pale blue wing patch conspicuous in flight. Underparts slightly paler. Bill and legs pinkish-gray. Sexes similar. Endemic to Ethiopian highlands.
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.
Blue-winged Goose
A medium-sized grey-brown goose-like duck with distinctive pale blue-grey wing patches visible in flight. Endemic to the Ethiopian Highlands. Grazes on short grass near mountain rivers and streams. Monogamous; pairs are permanent. Threatened by agricultural intensification and overgrazing.