Knob-billed Duck
Sarkidiornis melanotos
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Old World equivalent of the Comb Duck, with iridescent black-and-white body and the male's distinctive bill knob. Found across sub-Saharan Africa and South Asia. Uses tree cavities for nesting. Gregarious outside breeding season; forms large flocks at seasonal wetlands.
Physical Description
| Measurement | Value | Imperial |
|---|---|---|
| Flügelspannweite | 64,2 cm | 25.3 in |
| Gewicht | 1817,5 g | 64.11 oz |
Identifizierung
Gefieder
Males have white head with black spots; iridescent dark blue-black back and wings; white underparts with gray flanks. Large black fleshy knob atop bill. Females smaller, brown, and lack the knob. African species.
Habitat & Range
Freshwater lakes, marshes, floodplains, and forested wetlands across sub-Saharan Africa and South and Southeast Asia from India to southern China. Nests in large tree hollows near water.
Geografisches Verbreitungsgebiet
Breeds on sub-Arctic tundra; winters on the Atlantic coast of North America from Labrador to Florida and the Gulf Coast.
Diet & Feeding
Dabbles for seeds and aquatic invertebrates; diet shifts toward invertebrate prey in spring breeding season; widespread palearctic duck.
Erhaltungsstatus
Verhalten & Brutverhalten
Nistverhalten
Nest type: CV. Incubation: 28-30 days. Fledging: 70 days.
Gelegegröße
6-20
Lautgebung
Gesang
A low, grunting 'wuk' or soft, nasal 'krank'. Similar to Comb Duck in call quality. Generally quiet; calls are not loud or distinctive compared to other large African waterfowl.
Taxonomie
| Kingdom | Animalia |
| Phylum | Chordata |
| Class | Aves |
| Ordnung | Anseriformes (Wasservögel) |
| Familie | Anatidae (Enten, Gänse und Schwäne) |
| Genus | Sarkidiornis |
| Arten | Sarkidiornis melanotos |
Distribution
Knob-billed Duck has been recorded in 7 countries.
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External Databases
Häufig gestellte Fragen
What does the Knob-billed Duck eat?
Where does the Knob-billed Duck live?
Is the Knob-billed Duck endangered?
How does the Knob-billed Duck nest?
What does the Knob-billed Duck sound like?
How big is the Knob-billed Duck?
What order and family does the Knob-billed Duck belong to?
Similar Birds
Other species in the Anatidae family