Ferruginous Duck vs Spotted Whistling-duck
Aythya nyroca ile kıyaslandığında Dendrocygna guttata
Side-by-Side Comparison
| Özellik | Ferruginous Duck | Spotted Whistling-duck |
|---|---|---|
| Bilimsel Ad | Aythya nyroca | Dendrocygna guttata |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Near Threatened | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 36,5 cm (14.4 in) | 41,3 cm (16.3 in) |
| Ağırlık | 594,1666666666666 g (20.96 oz) | 677,5 g (23.90 oz) |
| Beslenme | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal habitats; diet dominated by hard-shelled invertebrates. | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| Kuluçka Büyüklüğü | 4-17 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
Ferruginous Duck only
Hiçbiri
Spotted Whistling-duck only
Ferruginous Duck
Freshwater lakes, marshes, and river deltas with dense emergent vegetation in southern Eurasia from central Europe east to Central Asia and China. Winters in the Mediterranean, South Asia, and sub-Saharan Africa.
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
Ferruginous Duck
Male emits a soft, wheeling purr; female gives a harsh, rapid quacking series. The male's quiet purring display call contrasts with the female's repeated, grating notes on Mediterranean marshes.
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
Ferruginous Duck
Breeds in boreal and sub-Arctic Canada; winters on the Atlantic coast from New England to the Gulf States.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
Koruma Durumu
Ferruginous Duck
Spotted Whistling-duck
How to Tell Them Apart
Ferruginous Duck
Rich chestnut-brown head, neck and breast; white undertail conspicuous. White eye in males (brown in females). Dark back. Bold white wing stripe in flight. Compact and rounded. Males brighter chestnut; …
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
Ferruginous Duck
A small compact diving duck. Males have rich chestnut-brown head and body, white eye, and white undertail; females are duller. Found across Eurasia and Africa. Locally common on Mediterranean and Central Asian lakes; population declining. Near Threatened globally.
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.