Höckerschwan vs Knob-billed Duck
Cygnus olor verglichen mit Sarkidiornis melanotos
Side-by-Side Comparison
| Merkmal | Höckerschwan | Knob-billed Duck |
|---|---|---|
| Wissenschaftlicher Name | Cygnus olor | Sarkidiornis melanotos |
| Ordnung | Anseriformes | Anseriformes |
| Familie | Anatidae | Anatidae |
| Erhaltungsstatus | Least Concern | Least Concern |
| Länge | 152,0 cm (59.8 in) | — |
| Flügelspannweite | 235,0 cm (92.5 in) | 64,2 cm (25.3 in) |
| Gewicht | 11000,0 g (388.01 oz) | 1817,5 g (64.11 oz) |
| Ernährung | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … | Dabbles for seeds and aquatic invertebrates; diet shifts toward invertebrate prey in spring breeding season; … |
| Gelegegröße | 5-7 | 6-20 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Höckerschwan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Knob-billed Duck
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.
Song & Call Comparison
Höckerschwan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in flight.
Knob-billed Duck
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.
Geographic Range & Migration
Höckerschwan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Knob-billed Duck
Breeds on sub-Arctic tundra; winters on the Atlantic coast of North America from Labrador to Florida and the Gulf Coast.
Erhaltungsstatus
Höckerschwan
Knob-billed Duck
How to Tell Them Apart
Höckerschwan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
Knob-billed Duck
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 …
About These Birds
Höckerschwan
Der Höckerschwan gehört zu den schwersten flugfähigen Vögeln; Männchen können bis zu 14 kg wiegen. Trotz seines englischen Namens („Mute Swan“, stummer Schwan) ist er keineswegs stumm und gibt zischende, grunzende und schnaubende Laute von sich. Höckerschwäne gehen lebenslange Paarbindungen ein, und ihre aggressive Verteidigung des Brutreviers ist bekannt.
Knob-billed Duck
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.