Lesser Whistling-duck vs Black-headed Duck
Dendrocygna javanica comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Lesser Whistling-duck | Black-headed Duck |
|---|---|---|
| Nombre científico | Dendrocygna javanica | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 38,8 cm (15.3 in) | 34,7 cm (13.7 in) |
| Peso | 525,0 g (18.52 oz) | 528,5 g (18.64 oz) |
| Dieta | Grazes subarctic grasses and rushes; migratory; winters on estuarine mudflats and coastal grasslands eating eelgrass … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 7-17 | 2 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Lesser Whistling-duck only
Black-headed Duck only
Ninguno
Lesser Whistling-duck
Freshwater wetlands, lakes, rice paddies, mangroves, and slow rivers across South and Southeast Asia from India through southern China to Borneo and Indonesia. Common near cultivated land and human settlements.
Song & Call Comparison
Lesser Whistling-duck
A softer, higher-pitched whistle than other Dendrocygna. Call is a quick 'we-we' given in flight. Smaller size reflected in higher-pitched and thinner quality of call.
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
Lesser Whistling-duck
Breeds on tundra of northern Canada and Alaska; winters on the Pacific coast from California to Mexico and Central America.
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
Lesser Whistling-duck
Black-headed Duck
How to Tell Them Apart
Lesser Whistling-duck
Warm chestnut-brown overall; head and neck brown; upperparts dark brown. Chestnut rump and upper-tail conspicuous in flight. Flanks chestnut with pale streaks. Bill and legs dark gray. 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
Lesser Whistling-duck
El pato silbador menor es el más pequeño de los patos silbadores y está ampliamente distribuido en el sur y el sudeste de Asia. Tiene plumaje de color marrón castaño con tonos más oscuros en el dorso. Habita en pantanos, arrozales, lagunas y ríos lentos con vegetación en India, Sri Lanka, el sudeste asiático e Indonesia. Es una especie nocturna que forrajea principalmente de noche.
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.