Gansito Verde

Identificación

Ranging from 30 to 36 cm (12 to 14 in) in length, the green pygmy goose is one of the smallest species of duck. It has a 48 to 60 cm (19 to 23.5 in) wingspan. It has a small bill and a compact form. The breeding male has a predominantly dark green back and neck, and a dark gray crown. The cheeks are white, and the underparts are pale grey and white scalloped. The tail, primary flight feathers and primary coverts are black, while the secondary flight feathers are white. The secondary coverts are a dark iridescent green. This iridescence is lost outside of the breeding season and the plumage becomes duller. The species exhibits a degree of sexual dimorphism — the female has a barred rather than green neck but otherwise resembles the non-breeding male. Immature birds are less brightly coloured, and have mottled dark brown heads.<p>The male has a high-pitched whistle and the female a lower-pitched call.

Taxonomía

First described in 1842 by the ornithologist John Gould, its specific name is derived from diminutive of the Latin adjective pulcher "pretty". It is one of three species in the Afro-Asian genus Nettapus, an ancient and unusual group of ducks. No subspecies are recognised.

Nombre científico

Nettapus pulchellus

Autoridad

Gould, 1842

Orden

Anseriformes

Familia

Anátidos

Género

Nettapus

Distribución y hábitat

The green pygmy goose is found in southern New Guinea and across northern Australia (from Western Australia, through Northern Territory and into Queensland). To the west, it commonly reaches Timor-Leste, where it possibly breeds at Lake Iralalara. It is largely resident, apart from dispersion in the wet season. The habitat is well-vegetated lowland lagoons and other permanent fresh waters.

Migración

Resident species

Conservación

Tendencia poblacional

declining