Black-headed Duck vs Maccoa Duck
Heteronetta atricapilla comparado com Oxyura maccoa
Side-by-Side Comparison
| Atributo | Black-headed Duck | Maccoa Duck |
|---|---|---|
| Nome científico | Heteronetta atricapilla | Oxyura maccoa |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Endangered |
| Comprimento | — | — |
| Envergadura | 34,7 cm (13.7 in) | 31,3 cm (12.3 in) |
| Peso | 528,5 g (18.64 oz) | 685,3333333333334 g (24.17 oz) |
| Dieta | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Dives for aquatic invertebrates and plant seeds in African lakes and marshes. Uses lobed feet … |
| Tamanho da postura | 2 | 4-12 |
| Population Trend | — | — |
Habitat Comparison
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.
Maccoa Duck
Male emits a rapid, staccato drumming display; female gives a harsh, emphatic quack. The drumming call is powerful and diagnostic; this endangered southern African stiff-tail displays at dawn.
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.
Maccoa Duck
Resident in eastern and southern Africa from Ethiopia and Kenya south to the Cape. Found on lakes and marshes with dense aquatic vegetation.
Estado de conservação
Black-headed Duck
Maccoa 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.
Maccoa Duck
Male has glossy black head, deep chestnut-red body, and vivid sky-blue bill; stiff tail often cocked. Female is dark brown above with streaked buff below and two pale facial stripes …
About These Birds
Black-headed Duck
O pato-parasita-de-cabeça-preta é um pato único da América do Sul que é um parasita de ninho obrigatório, não construindo o seu próprio ninho. Põe ovos exclusivamente nos ninhos de outros patos, principalmente patos de cauda rígida e macaquinhos-do-pântano. Os machos têm cabeça preta característica e corpo acastanhado. Habita zonas húmidas de água doce na Argentina, Uruguai, sul do Brasil e Chile. As fêmeas têm ovários altamente desenvolvidos e podem pôr muitos ovos ao longo de uma temporada.
Maccoa Duck
A stiff-tailed diving duck (~685 g) of sub-Saharan Africa, family Anatidae, males chestnut-bodied with a blue bill. Inhabits large, deep freshwater lakes and dams in eastern and southern Africa. Dives for aquatic invertebrates and vegetation. Endangered due to small, fragmented populations, habitat loss from wetland drainage, and competition with introduced species.