White-Winged Duck

The white-winged duck, or white-winged wood duck, is a large, secretive duck 66–81 cm long with a wingspan of 116–153 cm. Males weigh 2.94–3.9 kg and females 1.95–3.05 kg. It was formerly placed with the Muscovy duck in the genus Cairina, but genetic studies show the resemblance is deceiving and it belongs in its own genus. It was historically widely distributed from north-eastern India and Bangladesh through Southeast Asia to Java and Sumatra (Wikipedia, general species account).

It feeds mainly at dawn and dusk when moving between day roosts and feeding sites, and is omnivorous, eating pondweed, small fish, aquatic snails, spiders and insects. It lives on stagnant or slow-flowing natural and artificial wetlands within or adjacent to evergreen, deciduous or swamp forest, which it depends on for roosting and nesting, usually in tree holes. Lowlands below about 400 m are optimal, but it occurs up to 1,400 m (Wikipedia, general species account).