The Black-headed Ibis, known scientifically as Threskiornis melanocephalus, presents a striking figure with its predominantly white plumage, sharply contrasting with its black head and neck. The species, also referred to as the Oriental White Ibis, Indian White Ibis, or Black-necked Ibis, is a large wader, with adults typically ranging from 65 to 76 cm in length. Its tail is adorned with light grey ornamental feathers that turn a deep black during the breeding season, adding to its distinctive appearance.
To identify the Black-headed Ibis, look for the characteristic naked black head and neck, and the down-curved black beak. During the breeding season, you may notice bare patches under the wing turning a vivid blood-red, and some adults may exhibit a blueish tinge on the head or, more rarely, a pink or bright red patch behind the neck. Juveniles can be distinguished by their greyish neck and speckled brown-grey wings and back.
This adaptable bird frequents a variety of habitats, both natural and man-made. It can be found in freshwater and saltwater marshes, lakes, ponds, rice fields, crop fields, irrigation canals, riversides, reservoirs, urban lakes, open sewage gutters, grazing lots, and even garbage dumping sites.
The Black-headed Ibis breeds across South and Southeast Asia, from India to Japan. It is a native resident in countries such as Bangladesh, Cambodia, China, India, Indonesia, Malaysia, Myanmar, Nepal, Pakistan, Philippines, Sri Lanka, Thailand, and Vietnam. It is also known to migrate or appear as a vagrant in Japan, Korea, Laos, and Mongolia.
The species exhibits a seasonal preference for different foraging habitats, particularly in agricultural landscapes. In summer, it favors natural marshes and fallow fields, while during the monsoon, it disperses more widely into agricultural fields. In regions with more forests and rocky hills, wetlands remain the preferred habitat throughout the year.
The Black-headed Ibis is generally silent, lacking a true voice-producing mechanism. However, it does produce ventriloquistic grunts, particularly by pairs at the nest.
Breeding occurs only during the rainy season. The ibis nests in heronry colonies near wetlands, constructing platform nests of sticks lined with grass and threads. In urban areas, old trees are often utilized for both roosting and nesting.