Spot-billed Duck is resident of Pakistan and India to southern Japan. It is quite gregarious outside the breeding season and forms small flocks. Spot-billed Duck is 22–25 inches in length with 33–37 inches wings. The average body mass is 790–1500 grams.
Spot-billed Duck found near freshwater lakes and marshes. They feeds by dabbling for plant food mainly in the evening or at night. It nests on the ground in vegetation near water, and lays 8-14 eggs.
These are mainly grey ducks with a paler head and neck and a black bill tipped bright yellow. The wings are whitish with black flight feathers below, and from above show a white-bordered green speculum and white tertials. The male has a red spot on the base of the bill, which is absent or inconspicuous in the smaller but otherwise similar female. Juveniles are browner and duller than adults.