African Black Duck vs Black-necked Swan
Anas sparsa ile kıyaslandığında Cygnus melancoryphus
Side-by-Side Comparison
| Özellik | African Black Duck | Black-necked Swan |
|---|---|---|
| Bilimsel Ad | Anas sparsa | Cygnus melancoryphus |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 49,5 cm (19.5 in) | 82,4 cm (32.4 in) |
| Ağırlık | 996,8333333333334 g (35.16 oz) | 5275,0 g (186.07 oz) |
| Beslenme | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Grazes aquatic plants and dabbles for invertebrates; diet includes seeds, roots, and aquatic invertebrates in … |
| Kuluçka Büyüklüğü | 4-9 | 4-8 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
African Black Duck only
Hiçbiri
Black-necked Swan 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.
Black-necked Swan
Freshwater lakes, lagoons, rivers, estuaries, and coastal wetlands in southern South America from central Chile and Argentina to Tierra del Fuego. Partially migratory; concentrates at coastal estuaries in winter.
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-necked Swan
A musical, whistling 'whoo' or soft 'whooh'. Less loud than Trumpeter or Whooper Swan. Gives hissing at close range. Considered relatively quiet for a large swan.
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-necked Swan
Breeds across the northern Great Plains and prairie provinces; winters along the Atlantic coast and Gulf of Mexico.
Koruma Durumu
African Black Duck
Black-necked Swan
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-necked Swan
White body plumage with entirely black head, neck, and upper foreneck. Red double-lobed knob at bill base. Bill grayish-blue. White stripe behind eye. Pink-red legs. Sexes similar; striking contrast.
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-necked Swan
A large elegant swan with pure white body plumage and a contrasting jet-black neck and head, a red bill with bright red caruncle, and a white stripe behind the eye. Native to southern South America. Unique coloration makes it unmistakable. Feeds on aquatic vegetation by upending.