Fulvous Whistling-duck vs Black-headed Duck
Dendrocygna bicolor مقارنةً بـ Heteronetta atricapilla
Side-by-Side Comparison
| السمة | Fulvous Whistling-duck | Black-headed Duck |
|---|---|---|
| الاسم العلمي | Dendrocygna bicolor | Heteronetta atricapilla |
| الرتبة | Anseriformes | Anseriformes |
| الفصيلة | Anatidae | Anatidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 44,6 cm (17.6 in) | 34,7 cm (13.7 in) |
| الوزن | 733,4 g (25.87 oz) | 528,5 g (18.64 oz) |
| النظام الغذائي | Grazes grasses and sedges in Arctic tundra; large migratory goose; winter diet dominated by agricultural … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| عدد البيض في الوضع | 6-16 | 2 |
| Population Trend | — | — |
Habitat Comparison
Fulvous Whistling-duck
Freshwater marshes, rice paddies, flooded fields, shallow lakes, and river margins across warm tropical and subtropical regions of the Americas, Africa, and South Asia. Highly nomadic, following rains.
Song & Call Comparison
Fulvous Whistling-duck
A soft, rhythmic 'ka-WHEE-00' whistle. Flocks give continuous soft whistling sounds during flight over tropical wetlands. Also gives shorter 'kee' contact notes.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
Fulvous Whistling-duck
Breeds across Eurasia from Iceland and western Europe to eastern Siberia; winters from Britain to the Mediterranean and South Asia.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
حالة الحفاظ
Fulvous Whistling-duck
Black-headed Duck
How to Tell Them Apart
Fulvous Whistling-duck
Warm fulvous-buff underparts with creamy white flank stripes. Upperparts dark brown with pale buff feather edges. Dark brown stripe down back of neck. Long bluish-gray legs. Sexes identical.
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
Fulvous Whistling-duck
A medium-sized whistling-duck with warm tawny-brown body, dark brown back, creamy-white flank stripes, and a blue-grey bill. Among the most cosmopolitan of all waterfowl, occurring in North and South America, sub-Saharan Africa, and South Asia. Highly nomadic, following seasonal rainfall.
Black-headed Duck
A small diving duck (~530 g) of South America, family Anatidae, and the sole member of genus Heteronetta. Inhabits freshwater marshes and lakes in Argentina, Bolivia, Brazil, Chile, and Uruguay. Unique among waterfowl as an obligate brood parasite, laying eggs in nests of coots and other waterbirds. Feeds on seeds and aquatic invertebrates. Least Concern.