Black-headed Duck vs Hartlaub's Duck
Heteronetta atricapilla เปรียบเทียบกับ Pteronetta hartlaubii
Side-by-Side Comparison
| คุณสมบัติ | Black-headed Duck | Hartlaub's Duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Heteronetta atricapilla | Pteronetta hartlaubii |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 34.7 cm (13.7 in) | 53.4 cm (21.0 in) |
| น้ำหนัก | 528.5 g (18.64 oz) | 910.0 g (32.10 oz) |
| อาหาร | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Eats seeds, aquatic invertebrates, and plant matter; dabbles in ponds and marshes; diet more invertebrate-heavy … |
| จำนวนไข่ | 2 | 7-11 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Black-headed Duck only
Hartlaub's Duck only
Hartlaub's Duck
Tropical rainforest streams, forest pools, and shaded swamps from Guinea and Sierra Leone east through the Congo Basin to Uganda and western Kenya. Requires undisturbed riverine forest with shaded water.
Song & Call Comparison
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.
Hartlaub's Duck
A low, nasal 'quack' and soft 'kek-kek'. Generally quieter than other perching ducks. Calls from dense Central and West African rainforest where it is rarely observed.
Geographic Range & Migration
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.
Hartlaub's Duck
Breeds in wetlands across Eurasia; winters from Africa and the Middle East to South and Southeast Asia.
สถานะการอนุรักษ์
Black-headed Duck
Hartlaub's Duck
How to Tell Them Apart
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.
Hartlaub's Duck
Dark chocolate-brown body; white patches at side of head distinctive. Males have dark blue frontal shield extending from bill. Wings show pale blue-gray inner forewing. Legs gray. West African forest …
About These Birds
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.
Hartlaub's Duck
A large dark duck with a chestnut-brown body, dark head and neck, pale blue speculum, and bright red base to the bill in males. Found in tropical African rainforest streams and forest swamps. One of Africa's least-studied ducks. Lives singly or in pairs in shaded forest waterways.