African Black Duck vs Spectacled Duck
Anas sparsa ile kıyaslandığında Speculanas specularis
Side-by-Side Comparison
| Özellik | African Black Duck | Spectacled Duck |
|---|---|---|
| Bilimsel Ad | Anas sparsa | Speculanas specularis |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Least Concern | Near Threatened |
| Uzunluk | — | — |
| Kanat Açıklığı | 49,5 cm (19.5 in) | 52,4 cm (20.6 in) |
| Ağırlık | 996,8333333333334 g (35.16 oz) | 1248,25 g (44.03 oz) |
| Beslenme | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Eats aquatic plants, seeds, and invertebrates; dabbles in shallow water; diet varies widely between seasons … |
| Kuluçka Büyüklüğü | 4-9 | 4-9 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
African Black Duck only
Hiçbiri
Spectacled Duck only
Hiçbiri
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.
Spectacled Duck
Clear fast-flowing rivers and streams in temperate forest from central Chile and adjacent Argentina south to Tierra del Fuego. Requires cold turbulent mountain rivers with riparian forest. Avoids slow or muddy water.
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.
Spectacled Duck
Emits deep, guttural quacking notes; alarm is a loud, repeated honking bark. Calls are resonant and powerful, carrying far along fast-flowing Patagonian rivers.
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.
Spectacled Duck
Breeds in wetlands from Iceland to Siberia; winters in temperate and subtropical Asia, Europe, and North Africa.
Koruma Durumu
African Black Duck
Spectacled Duck
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 …
Spectacled Duck
Dark brown body with fine pale speckling. Distinctive white 'spectacle' rings around eyes. Iridescent greenish-bronze speculum. Underparts pale buff-brown. Bill grayish; legs orange. Andean and Patagonian streams.
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.
Spectacled Duck
A large dark brown duck with distinctive white spectacle-like eye-rings, a pale buff face, and a prominent white speculum. Found in fast-flowing forest rivers of southern South America. Shy and elusive; inhabits clear rushing rivers through temperate forest. Also known as the Bronze-winged Duck.