Madagascar Pochard vs Spotted Whistling-duck
Aythya innotata в сравнении с Dendrocygna guttata
Side-by-Side Comparison
| Характеристика | Madagascar Pochard | Spotted Whistling-duck |
|---|---|---|
| Научное название | Aythya innotata | Dendrocygna guttata |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Critically Endangered | Least Concern |
| Длина | — | — |
| Размах крыльев | 37,4 cm (14.7 in) | 41,3 cm (16.3 in) |
| Масса | 685,0 g (24.16 oz) | 677,5 g (23.90 oz) |
| Питание | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal and freshwater habitats. | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| Размер кладки | 6-10 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Madagascar Pochard only
Нет
Spotted Whistling-duck only
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.
Spotted Whistling-duck
Freshwater wetlands, rice fields, streams, and forest pools in New Guinea, Sulawesi, the Philippines, and Moluccas. Often found near forested rivers and seasonal swamps at low elevations.
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.
Spotted Whistling-duck
A musical, high whistle similar to other whistling-ducks. Call is softer and less far-carrying than White-faced or Black-bellied species. Given in flight and on water.
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.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
Охранный статус
Madagascar Pochard
Spotted Whistling-duck
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; …
Spotted Whistling-duck
Dark brown above; head and neck dark brown. Underparts heavily spotted white on dark brown ground, giving spotted appearance. Flanks with bold white spots. Pink-red bill and legs. Sexes similar.
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.
Spotted Whistling-duck
A small dark brown whistling-duck with bold white spots on its flanks, orange-red bill and legs, and a pale face. Found in tropical wetlands of New Guinea, the Philippines, and Indonesia. Often found near freshwater streams and flooded grassland. Less gregarious than other whistling-ducks.