A large grayish-brown duck with a diagnostic yellow-tipped black bill and a red spot at the base of the bill (missing in certain subspecies). In flight, note the green panel in the wing that is bordered in white. Often seen in small groups dabbling or tipping up in shallow water or walking on marshy land at the edge of freshwater lakes or in cultivated fields. Usually not seen associating with other species. Similar to Eastern Spot-billed Duck, but note green wing panel, lack of a distinct dark "moustache", and overall warmer tan coloration.