Black-headed Duck vs Lake Duck
Heteronetta atricapilla comparado con Oxyura vittata
Side-by-Side Comparison
| Atributo | Black-headed Duck | Lake Duck |
|---|---|---|
| Nombre científico | Heteronetta atricapilla | Oxyura vittata |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 34,7 cm (13.7 in) | 27,6 cm (10.9 in) |
| Peso | 528,5 g (18.64 oz) | 665,0 g (23.46 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 South American freshwater lakes and marshes. Feeds … |
| Tamaño de la puesta | 2 | 3-5 |
| 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.
Lake Duck
Male produces a mechanical, drumming staccato call; female gives a soft, nasal quack. Drumming display resembles other Oxyura stiff-tails; heard at dawn on Andean and Patagonian lakes.
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.
Lake Duck
Resident in southern South America from central Chile and central Argentina south to Tierra del Fuego. Found on lowland lakes and lagoons.
Estado de conservación
Black-headed Duck
Lake 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.
Lake Duck
Male is dark chestnut-brown with black head, pale whitish-grey cheeks, and cobalt-blue bill. Female is brownish-buff with streaked upperparts and a distinctive pale supercilium; undertail coverts whitish.
About These Birds
Black-headed Duck
El pato cabeza negra es un pequeño pato buceador (~530 g) de América del Sur, familia Anatidae, y el único miembro del género Heteronetta. Tiene la cabeza negra en el macho y cuerpo marrón. Parásita de nido obligada: pone sus huevos en los nidos de otras aves acuáticas, especialmente fochas y pollas de agua. Habita en lagos y lagunas con vegetación emergente de Argentina, Bolivia, Brasil, Chile, Paraguay y Uruguay. No cría su propia cría nunca.
Lake Duck
El pato capuchino o pato zambullidor sudamericano es un pato de cola tiesa del sur de América del Sur con el macho de cabeza y cuello negros y las partes superiores de color castaño rojizo. Habita en lagunas y estanques de agua dulce con juncos y totoras. Como otros patos de cola tiesa, lleva la larga y erguida cola a menudo levantada en ángulo durante la natación.