Adult: The head is slaty-black with slight iridescent blue gloss around the eye and on the top of the head. Feathers of the nape are elongated, slaty-black with little or no iridescence. The neck featers are even more elongated and brilliantly glossed iridescent green with blue and gold reflections. The mantle and scapulars are relatively elongated (compared to other pigeon species), rather pointed and brilliant iridescent green. Wing-coverts are also somewhat pointed and iridescent green and blue. The tertials, secondaries and primaries are blackish with a violet-blue sheen especially strong on the tertials. The uppertail-coverts and tail are white. Underparts are entirely slaty-black with the neck feathers elongated forming a ruff and most feathers showing a green and blue iridescence; very faint on the throat, strongest on the underwing-coverts, breast and belly. The underside of the primaries and secondaries are black. Iris is variable dull brown, dark grey to whitish. Orbital skin is black. The bill is black and the cere has a conspicuous erect knob. Feet are dark greyish-purple to coral red with paler yellow or flesh-colored claws.

Juvenile: Juveniles are oily black, lacking the neck hackles which are just emerging. The plumage becomes glossier as the postnestling moult makes it almost identical to the adult except for the tail being entirely or partly black. This immature plumage may be retained for some time. Feet are brownish.

Other Names:

Tropical islets which are still covered with original coastal forest.

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