Madagascar Pochard vs Höckerschwan
Aythya innotata verglichen mit Cygnus olor
Side-by-Side Comparison
| Merkmal | Madagascar Pochard | Höckerschwan |
|---|---|---|
| Wissenschaftlicher Name | Aythya innotata | Cygnus olor |
| Ordnung | Anseriformes | Anseriformes |
| Familie | Anatidae | Anatidae |
| Erhaltungsstatus | Critically Endangered | Least Concern |
| Länge | — | 152,0 cm (59.8 in) |
| Flügelspannweite | 37,4 cm (14.7 in) | 235,0 cm (92.5 in) |
| Gewicht | 685,0 g (24.16 oz) | 11000,0 g (388.01 oz) |
| Ernährung | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal and freshwater habitats. | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| Gelegegröße | 6-10 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Madagascar Pochard
Restricted to Lake Matsaborimena in the highlands of northern Madagascar at about 1,500 m altitude. Uses deep-water mountain lakes with aquatic vegetation. Critically Endangered; tiny wild population.
Höckerschwan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Madagascar Pochard
Critically Endangered; produces a soft, Aythya-like purring and grating quacking. Calls are not well-documented; likely similar to closely related Ferruginous Duck based on phylogeny.
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.
Geographic Range & Migration
Madagascar Pochard
Breeds across the northern boreal zone of Canada and Alaska; winters along the Pacific and Atlantic coasts of North America.
Höckerschwan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Erhaltungsstatus
Madagascar Pochard
Höckerschwan
How to Tell Them Apart
Madagascar Pochard
Males have brown head and neck; dark brown back; pale gray flanks with white undertail. White eye. Blue-gray bill. Females browner with pale face patch and brown eye. Critically endangered; …
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
About These Birds
Madagascar Pochard
One of the world's rarest ducks; considered possibly extinct until 2006 rediscovery. A small brown pochard with a white eye in males. Found on an extremely small highland lake in Madagascar. Critically Endangered; intensive conservation efforts underway to save the tiny wild population.
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.