Black-headed Duck vs Harlequin Duck
Heteronetta atricapilla comparado con Histrionicus histrionicus
Side-by-Side Comparison
| Atributo | Black-headed Duck | Harlequin Duck |
|---|---|---|
| Nombre científico | Heteronetta atricapilla | Histrionicus histrionicus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 34,7 cm (13.7 in) | 38,8 cm (15.3 in) |
| Peso | 528,5 g (18.64 oz) | 553,0 g (19.51 oz) |
| Dieta | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Forages in fast-flowing streams for aquatic insect larvae, amphipods, and small fish. Dives and clings … |
| Tamaño de la puesta | 2 | 3-9 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Ninguno
Black-headed Duck only
Harlequin Duck only
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.
Harlequin Duck
Male gives a squeaky, mouse-like squeal; female produces a guttural, grunting call. The male's bizarre, high-pitched squealing call is completely unexpected in such a compact seaduck.
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.
Harlequin Duck
Breeds on fast-flowing rivers in Iceland, Greenland, and northern North America. Winters along rocky Pacific and Atlantic coasts south to California.
Estado de conservación
Black-headed Duck
Harlequin 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.
Harlequin Duck
Male is slate-blue with bold white crescent before eye, white spots and streaks on head, neck, and scapulars, and rich chestnut flanks. Female is dark sooty-brown with three white facial …
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.
Harlequin Duck
El pato arlequín es un espectacular pato de agua dulce con el macho de color azul-gris con parches blancos y castaños bordeados de negro, recordando el traje de un arlequín. Habita en ríos y arroyos de montaña de aguas rápidas e impetuosas durante la temporada reproductora, siendo uno de los pocos patos adaptados a la vida en torrentes de montaña. Inverna en costas rocosas.