Black-headed Duck vs Cotton Pygmy-goose
Heteronetta atricapilla comparado con Nettapus coromandelianus
Side-by-Side Comparison
| Atributo | Black-headed Duck | Cotton Pygmy-goose |
|---|---|---|
| Nombre científico | Heteronetta atricapilla | Nettapus coromandelianus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 34,7 cm (13.7 in) | 31,7 cm (12.5 in) |
| Peso | 528,5 g (18.64 oz) | 343,5 g (12.12 oz) |
| Dieta | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Feeds on aquatic invertebrates, seeds, and plant material; dabbles in shallow water; invertebrate diet peaks … |
| Tamaño de la puesta | 2 | 6-18 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Black-headed Duck only
Cotton Pygmy-goose only
Cotton Pygmy-goose
Freshwater lakes, ponds, slow rivers, and rice paddies with aquatic vegetation from India east through Southeast Asia, China, and New Guinea to northern and eastern Australia. Nests in tree holes near water.
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.
Cotton Pygmy-goose
Male emits a rapid, clucking chatter resembling a toy rattle; female responds with soft, muffled quacks. In flight both sexes produce a distinctive whistling wing-beat.
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.
Cotton Pygmy-goose
Breeds in northern Eurasia; winters in the tropics of Africa and Asia. Migratory; routes cross through the Middle East.
Estado de conservación
Black-headed Duck
Cotton Pygmy-goose
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.
Cotton Pygmy-goose
Males white below and white-faced with dark green crown and collar; black back with iridescent green gloss; white wing bar conspicuous in flight. Females brown-gray with pale supercilium. Tiny; perches …
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.
Cotton Pygmy-goose
El pato enano de Asia es uno de los patos más pequeños del mundo, con el macho en plumaje nupcial de color negro brillante con el cuello, la parte delantera y una banda alar de color blanco. Habita en lagunas tranquilas con abundante vegetación acuática flotante en el sur y el sudeste de Asia y el norte de Australia. Anida en cavidades de árboles sobre el agua.