The Swamp Deer is a large deer with a shoulder height of 44 to 46 in (110 to 120 cm) and a head-to-body length of nearly 6 ft (180 cm). Its hair is rather woolly and yellowish brown above but paler below, with white spots along the spine. The throat, belly, inside of the thighs and beneath the tail is white. In summer the coat becomes bright rufous-brown. The neck is maned. Females are paler than males. Young are spotted. Average antlers measure 30 in (76 cm) round the curve with a girth of 5 in (13 cm) at mid beam. A record antler measured 104.1 cm (41.0 in) round the curve. Stags weigh 170 to 280 kg (370 to 620 lb). Females are less heavy, weighing about 130 to 145 kg (290 to 320 lb). Large stags have weighed from 460 to 570 lb (210 to 260 kg).
This was a herd of 8 individuals. All of them were either females or youngs. These deer are rather common in Bardiya, Nepal, where one can see as many as 5 species of deer in one day. The others are Sambar Deer, Indian Muntjac, Spotted Deer and Hog Deer.