Egyptian Goose vs Black-headed Duck
Alopochen aegyptiaca comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Egyptian Goose | Black-headed Duck |
|---|---|---|
| Nombre científico | Alopochen aegyptiaca | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 71,2 cm (28.0 in) | 34,7 cm (13.7 in) |
| Peso | 2021,3333333333333 g (71.30 oz) | 528,5 g (18.64 oz) |
| Dieta | Feeds on seeds, grasses, and invertebrates; forages on land and water; diet shifts between terrestrial … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 5-14 | 2 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Egyptian Goose only
Ninguno
Black-headed Duck only
Ninguno
Egyptian Goose
Native to sub-Saharan Africa and the Nile Valley; also introduced in western Europe. Freshwater margins, agricultural fields, parks, and golf courses. Highly adaptable; common near human habitation.
Song & Call Comparison
Egyptian Goose
A harsh, honking 'haw-haw' from males; females give a reedy, nasal 'kink-kink'. Very vocal and aggressive; pairs call repeatedly near nest sites in African wetlands.
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
Egyptian Goose
Formerly bred in eastern North America; range collapsed in the 19th century. Extinct by 1914; last wild individual shot in 1900.
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
Egyptian Goose
Black-headed Duck
How to Tell Them Apart
Egyptian Goose
Pale grayish-brown with chestnut-brown patch around eye and dark chestnut patch on breast center. Wings show large white patch and black-and-green speculum in flight. Pinkish bill and legs. 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
Egyptian Goose
El ganso del Nilo o oca egipcia es un grande y agresivo pato del África subsahariana y el Valle del Nilo. Tiene plumaje leonado con manchas marrones en el pecho y las alas, y un llamativo parche marrón alrededor del ojo. Ha sido introducido en Europa, donde ha establecido poblaciones silvestres en el Reino Unido, los Países Bajos y Alemania. Es muy territorial durante la cría.
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.