National Park and Namdapha National Park. The white-winged duck occurs in dense tropical evergreen forests, near rivers and swamps. They tend to nest in tree cavities, and are threatened in part since the destruction of hollow trees is destroying their nesting localities. The draining of swamps and rivers and other forms of habitat destruction is also destroying the habitat that they could survive in. Additional threats include loss of genetic variability, disturbance, hunting, and collection of eggs and chicks for food or pets. Due to ongoing habitat loss, a small population size, and because this duck is hunted for food, eggs and pets, the white-winged duck is evaluated as Endangered on the IUCN Red List of Threatened Species. It is listed on Appendix I of CITES. The white-winged duck is also found in the central Sumatra province of Riau, specifically in the peatland Acacia plantations of a large pulp and paper company. The plantations, at least temporarily, provide suitable habitat between periodic harvests (once every 4–5 years). The ducks are frequently observed along canals where large and overhanging Acacia trees provide shade and cover from predators and a haven in which to feed and rest. The quiet and still water in the canals of the plantations provides an undisturbed and secluded location, away from local communities which may hunt the ducks or collect their eggs. Nearby, natural forest conservation areas and greenbelts also provide suitable nesting and roosting habitat in close proximity to the canals. It is the state bird of the Indian state of Assam. There have been efforts to preserve the population by breeding in captivity in England. It has been seen that they do well under shady, dimly-lit conditions, but there is also a higher chance for them to contract avian tuberculosis. References External links white-winged duck white-winged duck Birds of Southeast Asia Birds of Northeast India Fauna of Assam white-winged duck Symbols of Assam