Tortora smeraldina asiatica

Identificazione

The common emerald dove is a stocky, medium-sized pigeon, typically 23–27 cm (9.1–10.6 in) in length. The back and wings are bright emerald green. The flight feathers and tail are blackish, and broad black and white bars show on the lower back in flight. The head and underparts are dark vinous pink, fading to greyish on the lower belly. The eyes are dark brown, the bill bright red and legs and feet rufous.The male has a white patch on the edge of the shoulders and a grey crown, which the female lacks. Females will tend to have a browner complexion with a grey mark on the shoulder. Immature birds resemble females but have brown scallops on their body and wing plumage.

Tassonomia

In 1743, the English naturalist George Edwards included a picture and a description of the common emerald dove in his A Natural History of Uncommon Birds. He used the English name "Green Wing'd Dove". His drawing was made from a live bird at the home a merchant in Rotherhithe near London. Edwards was told that the dove had come from the East Indies. When in 1758 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the tenth edition, he placed the common emerald dove with all the other pigeons in the genus Columba. Linnaeus included a brief description, coined the binomial name Columba indica and cited Edwards's work. The specific epithet indica is Latin for "Indian" and is used by Linnaeus to denote the East Indies. The species is now placed in the genus Chalcophaps that was introduced by the English ornithologist John Gould in 1843.<p>Six subspecies are recognised:

Nome scientifico

Chalcophaps indica

Autorità

(Linnaeus, 1758)

Ordine

Columbiformi

Famiglia

Columbidae

Genere

Chalcophaps

Areale e habitat

This is a common species in tropical forests and similar dense wet woodlands, farms and mangroves. It builds a scant stick nest in a tree up to five metres and lays two cream-coloured eggs.

Migrazione

Resident species

Comportamento

Emerald doves usually occur singly, pairs or in small groups. They are quite terrestrial, often searching for fallen fruit on the ground and spending little time in trees except when roosting. They eat seeds and fruits of a wide variety of plants and are generally tame and approachable. They are rare and are usually found foraging in small groups or pairs. If there's a resource rich area, small groups will maintain a territory. Its flight is fast and direct, with the regular beats and an occasional sharp flick of the wings which are characteristic of pigeons in general. It often flies low between the patches of dense forest it prefers, but when disturbed will frequently walk away rather than fly. They are particularly good weavers when flying through forests. When flying they expose a buff underwing and a chestnut colour of their flight feathers.<p>The call is a low soft moaning cooing consisting of about six to seven coos starting quietly and rising. They also call a nasal "hoo-hoo-hoon". Males perform a bobbing dance during courtship.

Conservazione

Tendenza della popolazione

declining