Nicobar Megapode

Identificazione

Megapodes are so named for their large feet and like others in the group, this species is fowl like with dark brown plumage, a short tail and large feet and claws. The tarsus is bare with the hind toe situated on the same level as the front toes unlike those of other Galliform birds, enabling them to grasp objects better than other game birds. The tarsus has broad flat strip like scales on the front. The tail is short with twelve feathers. The head is more grey with a rufous crest and bare reddish facial skin. The males and females are very similar but the male is dark brown overall while the female has more grey on the underparts. Young birds have a fully feathered face and hatchlings are small quail-like with rufous barring on the wings and back. The nominate subspecies is paler than abbotti from the islands south of the Sombrero Channel.

Tassonomia

This species was collected by Reverend Jean Pierre Barbe and described by Edward Blyth in 1846. Some workers have considered the species to be subspecies of the dusky megapode (Megapodius freycinet). The exact island from which the original type specimen came was not known and a later specimen from Trinkat Island, described as Megapodius trinkutensis is now considered to be indistinguishable from the nominate subspecies. In 1901, W L Abbott collected specimens from Little Nicobar which were described in 1919 by H C Oberholser as a new subspecies abbotti, distinguished by its darker brown plumage.

Nome scientifico

Megapodius nicobariensis

Autorità

Blyth, 1846

Ordine

Galliformi

Famiglia

Megapodiidae

Genere

Megapodius

Areale e habitat

The species is found only in the Nicobar Islands. This range is so well separated from the main megapode distribution (especially of the genus Megapodius) that in 1911, it was suggested, on the basis that many megapodes were domesticated and transported by native islanders, that it may have been introduced into the Nicobar Islands. There have been suggestions that the species may have formerly occurred in the Andaman Islands as there are some late 19th century reports of the species on Great Coco and Table Island. The nominate subspecies is found on the islands north of the Sombrero Channel while abbotti is found south of it. It has been found on the islands of Tillangchong, Bompuka, Teressa, Camorta, Trinket, Nancowry, Katchal, Meroe, Trak, Treis, Menchal, Little Nicobar, Kondul, Great Nicobar and Megapode Island. The species may have occurred on Car Nicobar in the early 1900s. A survey after the 2004 tsunami, however, indicated that the species had been extirpated on the islands of Trax and Megapode. The eggs as well as adults are sought after by natives for food and birds may have been transported across islands. The 19th century ornithologist Allan Octavian Hume considered the taste of the meat as being between that of a "fat Norfolk turkey and a fat Norfolk pheasant".

Migrazione

Specie stanziale

Comportamento

Comportamento migratorio: Specie stanziale.

Conservazione

Tendenza della popolazione: stabile.

Tendenza della popolazione

stabile