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Description
The black-headed ibis (Threskiornis melanocephalus) is a species of wading bird of the ibis family Threskiornithidae which breeds in the South- and Southeast Asia from India to the west and as far east as Japan. It is variously referred to as the Oriental White Ibis, Indian White Ibis, and the black-necked ibis. It is the only native ibis species in its range that has an overall white plumage with a black neck and head. The down-curved beak and legs are also black. Though often referred to as a wetland species, the black-headed ibis forages in a range of natural and man-made habitats. This species of ibis nests only during the rainy season (or monsoon).
The black-headed ibis is one of several large waterbird species in south and south-east Asia, with adults measuring 65-76 cm in length. The white plumage is starkly contrasted against a conspicuous naked black neck and head, and black down-curved beak. Tails of adults bear light grey ornamental feathers that turn jet black during the breeding season. During the breeding season, bare patches under the wing turn blood-red. The head of some breeding adults gain a blueish tinge, or very rarely have a pink or bright red patch behind the neck. Some breeding adults also develop tufts of white feathers behind the neck, and rarely also get a yellowish colouration on the breast and back. Sexes are identical but juveniles are identifiable from adults in having greyish feathering on the neck and speckled brown-grey feathering on the wings and back. Like storks and spoonbills, it lacks a true voice-producing mechanism and is silent except for ventriloquistic grunts uttered by pairs at the nest.
As per IUCN list it is a nearly threatened species.

Description
The black-headed ibis (Threskiornis melanocephalus) is a species of wading bird of the ibis family Threskiornithidae which breeds in the South- and Southeast Asia from India to the west and as far east as Japan. It is variously referred to as the Oriental White Ibis, Indian White Ibis, and the black-necked ibis. It is the only native ibis species in its range that has an overall white plumage with a black neck and head. The down-curved beak and legs are also black. Though often referred to as a wetland species, the black-headed ibis forages in a range of natural and man-made habitats. This species of ibis nests only during the rainy season (or monsoon).
The black-headed ibis is one of several large waterbird species in south and south-east Asia, with adults measuring 65-76 cm in length. The white plumage is starkly contrasted against a conspicuous naked black neck and head, and black down-curved beak. Tails of adults bear light grey ornamental feathers that turn jet black during the breeding season. During the breeding season, bare patches under the wing turn blood-red. The head of some breeding adults gain a blueish tinge, or very rarely have a pink or bright red patch behind the neck. Some breeding adults also develop tufts of white feathers behind the neck, and rarely also get a yellowish colouration on the breast and back. Sexes are identical but juveniles are identifiable from adults in having greyish feathering on the neck and speckled brown-grey feathering on the wings and back. Like storks and spoonbills, it lacks a true voice-producing mechanism and is silent except for ventriloquistic grunts uttered by pairs at the nest.
As per IUCN list it is a nearly threatened species.