White-Winged Duck Conservation Explained

The white-winged duck (Asarcornis scutulata), also called the white-winged wood duck and known in Assam as the deo hans, is a rare, secretive forest duck of Northeast India, and white-winged duck conservation in India means protecting the small wetland pools inside evergreen forest where the bird feeds, roosts and nests. It is the state bird of Assam and is listed as Endangered by the International Union for Conservation of Nature (IUCN).

The bird is one of the largest and most unusual ducks in Asia. It is largely nocturnal, nests in tree cavities and spends much of its day hidden in forest, so it is rarely seen even in the places where it lives. The Indian population is believed to be only a few hundred birds at most, concentrated in Assam, Arunachal Pradesh and a few neighbouring areas, which makes India one of the most important countries for its survival.

Key Takeaways

• The white-winged duck is the state bird of Assam, where it is called the deo hans, and it is classed as Endangered by the IUCN.
• The white-winged duck is a large, mostly nocturnal forest duck that nests in tree cavities and lives around small pools in tropical evergreen forest.
• The Indian population of the white-winged duck is believed to be only a few hundred birds, found mainly in Assam and Arunachal Pradesh.
• The main threats to the white-winged duck are loss of lowland forest, drainage of forest wetlands, hunting and disturbance from logging and oil and gas activity.
• Important sites for the white-winged duck in India include Dibru-Saikhowa, Nameri, the Dehing Patkai landscape and Namdapha, along with community forests in the Northeast.
• The white-winged duck is a Schedule I species under the Wildlife (Protection) Act, 1972, and is covered by international trade restrictions under CITES.

What is the white-winged duck?

The white-winged duck is a large, dark forest duck, about 80 centimetres long, that is named for the bright white patches on its wings and for its white head flecked with black. It belongs to the family Anatidae and is the only living member of its genus, Asarcornis, which makes it unusually distinct among ducks.

The body is a rich chestnut brown to blackish, with a white or pale head and neck speckled with black spots. In flight, the broad white wing patches and pale blue-grey wing coverts show clearly. The male is larger than the female and has a more strongly marked head. The call is a loud, wailing or trumpeting sound that carries through the forest, and it is usually heard at night or at dusk.

Unlike most ducks, which are open-water birds, this species behaves more like a forest bird. It roosts and nests in trees, perches on branches and moves between pools at night.

Where does the white-winged duck live in India?

The white-winged duck lives in India in the lowland and foothill evergreen and semi-evergreen forests of the Northeast, particularly in Assam and Arunachal Pradesh, where it uses small forest pools, swamps and slow-moving streams. It has also been recorded from a few other Northeastern areas, including parts of Nagaland and Meghalaya, although such records are rare and often not confirmed.

The best-known Indian sites are described below.

• Dibru-Saikhowa National Park and Biosphere Reserve, Assam: A mosaic of riverine forest, swamp and grassland on the Brahmaputra floodplain that supports a number of the duck’s pools.
• Nameri National Park and Pakke area: Foothill forests on the Assam and Arunachal border with streams and pools used by the species.
• Dehing Patkai landscape, Assam: A large tract of lowland rainforest in Dibrugarh and Tinsukia districts, often called the Amazon of the East, that holds the duck in small numbers; the area was given enhanced protected status as a wildlife sanctuary.
• Namdapha and other Arunachal forests: The Namdapha landscape and other forests in eastern Arunachal Pradesh have long been associated with the species.

Beyond India, the bird lives in forests of Bangladesh, Myanmar, Thailand, Laos, Vietnam, Malaysia and Indonesia, although it has become extremely rare or disappeared from several of these countries. The Indonesian islands of Sumatra and Java are sometimes said to hold a notable share of the world population.

How does the white-winged duck live and breed?

The white-winged duck is mainly active at night, feeding in forest pools and swamps after dusk and spending the day roosting in tall trees or in thick cover near water. It feeds on aquatic insects, snails, small fish, frogs, seeds, tubers and the shoots of water plants, which it gathers by dabbling and by dipping its head under the surface.

Breeding takes place between roughly March and August, which includes the monsoon. The female nests in a large hollow in a tree, such as a natural cavity in an old trunk, sometimes several metres above the ground. She lays about six to fifteen eggs, though clutch sizes vary, and incubates them for about a month. After hatching, the ducklings jump from the tree to the ground and are led to water by the female.

Because of its dependence on large old trees with cavities, the duck cannot easily breed in young plantations or heavily logged forest. The loss of a single large nest tree can be a significant blow to a local population.

Why is the white-winged duck called the deo hans?

The white-winged duck is called the deo hans in Assamese because its loud night calls and elusive habits led local people to link it with the spirit world. The name is usually translated as ghost duck or spirit duck, and it reflects the bird’s mysterious, shadowy character in the forest.

How many white-winged ducks are there?

The global population of the white-winged duck is estimated at only a few hundred to a thousand birds, and the Indian population is generally estimated at a few hundred or fewer, but these figures are uncertain because the species is so secretive. Surveys are difficult because the bird is active at night, lives in dense forest and often uses remote pools.

The population has declined sharply across Southeast Asia, where large areas of lowland forest have been cleared. In Thailand and Vietnam, for example, the species has become exceedingly rare or has apparently vanished from former sites. India and Indonesia are therefore seen as the last strongholds, and Indian protected areas carry great responsibility.

The IUCN lists the white-winged duck as Endangered because its population is very small, fragmented and still declining.

Why is the white-winged duck endangered?

The white-winged duck is endangered mainly because the lowland forests and forest wetlands it depends on have been cleared, drained and degraded, and because hunting and disturbance have further reduced its numbers. Its very specific needs make it vulnerable to even small changes in habitat.

• Loss of lowland forest: Logging, clearing for tea gardens, farmland, settlements and plantations has removed much of the lowland evergreen forest in Assam and Arunachal Pradesh.
• Loss of nest trees: Large old trees with natural cavities are felled for timber, and the loss of these trees can stop the birds from breeding.
• Drainage and degradation of pools: Forest wetlands are drained, silted or polluted, and their water quality and food supply decline.
• Hunting and egg collection: Ducks and eggs are hunted for food in some places, and the birds are easy to disturb at roosts and nests.
• Disturbance from extraction: Illegal logging, firewood collection, oil and gas exploration, mining and roads bring people and noise into sensitive forest pools.
• Floods and climate change: Extreme floods, altered river flow and changing rainfall patterns may affect nesting success and wetland availability.
• Small, isolated populations: Even a few lost birds can cause a local population to disappear.

How is the white-winged duck protected in India?

The white-winged duck is protected in India by the Wildlife (Protection) Act, 1972, which gives it the highest level of legal protection, by national parks and sanctuaries in the Northeast, and by its listing in CITES Appendix I, which prohibits international commercial trade. The Act makes hunting, capture and trade in the species punishable offences.

Conservation organisations have played a major role in field research and community outreach. Groups such as Aaranyak, the Wildlife Trust of India and the Bombay Natural History Society (BNHS), together with the Assam Forest Department and international partners, have surveyed pools, trained local monitors and run awareness programmes in villages near duck habitat.

Because the bird is the state bird of Assam, it has a cultural profile that helps with advocacy. Schools, tea estates and local committees in places like Dibrugarh and Tinsukia have taken part in awareness drives and nest-site protection.

What conservation methods are used for the white-winged duck?

Conservation of the white-winged duck relies on protecting forest and wetland habitat, monitoring pools, safeguarding nest trees, working with local communities and, in some cases, captive breeding. The methods are described in the table below.

Why does white-winged duck conservation matter?

White-winged duck conservation matters because the species is a rare and unique bird that serves as a flagship for the lowland rainforests and forest wetlands of Northeast India, one of the world’s biodiversity hotspots. Protecting the duck means protecting a whole community of plants and animals.

• The forest pools used by the duck are also home to the Asian elephant, hoolock gibbon, tiger, clouded leopard, various primates and many hornbills and other forest birds.
• The duck is a sensitive indicator of the health of lowland forest wetlands, so its presence suggests that the water, trees and food chain are in good condition.
• Forests in the Dehing Patkai and Dibru-Saikhowa regions regulate local climate, store carbon and protect watersheds that supply nearby communities.
• As a state bird, the deo hans carries cultural meaning for people in Assam and can bring visibility to wider conservation needs.

How can people help the white-winged duck?

People can help the white-winged duck by supporting forest protection in the Northeast, avoiding disturbance to forest pools and nest sites, reporting poaching or illegal felling to forest officials and backing local conservation groups. Visitors to national parks should follow the rules, avoid night-time disturbance and never share exact nest locations publicly.

Tea estates, local councils and villages near the forest can protect the bird by maintaining wetlands, keeping large old trees standing and preventing the use of snares and traps. Responsible forest and nature tourism that employs local guides can also provide income that depends on keeping the habitat intact.

Bottom Line

The white-winged duck is an endangered, secretive forest duck whose survival in India rests on a few lowland forests and wetland pools in Assam, Arunachal Pradesh and neighbouring states. Protecting its old nest trees and quiet forest pools, with the support of local communities, is the most reliable way to keep the deo hans alive.

Frequently Asked Questions

Which state has the white-winged duck as its state bird?

The white-winged duck is the state bird of Assam, where it is known as the deo hans. The name is often translated as ghost duck or spirit duck. It was chosen because the bird is rare, distinctive and closely tied to the forests of the Northeast.

Is the white-winged duck endangered?

Yes, the white-winged duck is classed as Endangered by the IUCN because its population is very small, scattered and declining. It faces threats from loss of lowland forest, wetland drainage, hunting and disturbance. In India it is also given the highest protection under the Wildlife (Protection) Act, 1972.

Where can I see the white-winged duck in India?

The white-winged duck is found in the forests of Assam and Arunachal Pradesh, including areas such as Dibru-Saikhowa, Nameri, the Dehing Patkai landscape and Namdapha. It is very shy and mostly nocturnal, so sightings are rare and never guaranteed. Visitors should hire local guides and follow forest department rules.

Why is the white-winged duck mostly active at night?

The white-winged duck is mostly active at night because the darkness helps it avoid predators and human disturbance while it feeds in forest pools. During the day it hides in trees or thick cover. Its nocturnal habits and remote habitat are among the reasons it is so little known.

Does the white-winged duck nest in trees?

Yes, the white-winged duck nests in large natural tree cavities, often several metres above the ground. The ducklings jump down from the tree soon after hatching and follow the female to the water. This dependence on old, hollow trees makes forest logging a serious threat.

How many white-winged ducks are left in the world?

The global population of the white-winged duck is estimated to be only a few hundred to about a thousand birds, and the Indian population is believed to be a few hundred or fewer. These numbers are approximate because the species is secretive and hard to survey. Strongholds are thought to be in Northeast India and in Sumatra and Java in Indonesia.

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