Black-bellied Whistling-duck vs Black-headed Duck
Dendrocygna autumnalis comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Black-bellied Whistling-duck | Black-headed Duck |
|---|---|---|
| Nombre científico | Dendrocygna autumnalis | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 48,2 cm (19.0 in) | 34,7 cm (13.7 in) |
| Peso | 757,9 g (26.73 oz) | 528,5 g (18.64 oz) |
| Dieta | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes and agricultural fields eating … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 9-18 | 2 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Black-bellied Whistling-duck only
Ninguno
Black-headed Duck only
Black-bellied Whistling-duck
Freshwater wetlands, ponds, lake margins, flooded fields, and wooded swamps from the southern United States and Mexico through Central America to Ecuador, Bolivia, and Argentina. Uses nest boxes readily.
Song & Call Comparison
Black-bellied Whistling-duck
A high, reedy whistle 'pe-che-che-ne' given in flight. Flocks produce a continuous whistling chorus. Also gives a squeaky 'whe-eee' contact call while swimming.
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
Black-bellied Whistling-duck
Inhabits freshwater marshes and riverbanks from southeastern Brazil to northern Argentina and Bolivia. Sedentary; locally common.
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.
Estado de conservación
Black-bellied Whistling-duck
Black-headed Duck
How to Tell Them Apart
Black-bellied Whistling-duck
Gray head with brown cap and chestnut breast; black belly is distinctive. Wings show broad white patch in flight. Coral-pink bill and long pink legs. Upright posture. Sexes similar.
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
Black-bellied Whistling-duck
El pato silbador piquirrojo es un pato silbador de América, reconocible por el largo pico rojo, las patas rojas y el plumaje de color castaño con blanco en el ala en vuelo. Es un pato sociable y ruidoso que habita en lagunas, pantanos y humedales tropicales desde el sur de Texas hasta el norte de Argentina. Anida en huecos de árboles, a menudo en cavidades de palmeras.
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.