Sangai - Biology and Behavior

Biology and Behavior

The Brow-antlered deer is a medium-sized deer, with uniquely distinctive antlers, measuring 100–110 cm. in length with extremely long brow tine, which form the main beam. The two tines form a continuous curve at right angles to the closely set pedicels. This signifies its name, brow-antlered deer, the forward protruding beam appears to come out from the eyebrow. The antlers of the opposite sides are unsymmetrical with respect to each other. The beams are unbranched initially whereas curvature increases as length increases and they get forked also. The sexes are moderately dimorphic in body size and weight. The height and weight of a fully grown stag may be approximately 115–125 cm at shoulder and 95 to 110 kg (210 to 230 lb) respectively. The height and weight of the female are shorter and less as compared to the male counterpart. The length of the body from the base to the ear up to the tail is about 145 to 155 cm in both sexes. The tail is short and rump patch is not pronounced.

Sangai feed on a variety of water living plants, grasses, herbaceous plants, and shoots. Zizania latifolia, Saccharum munja, S. bengalensis, Erianthus procerus, E. ravernnae, etc. are the favorite food plants of Sangai. Feeding behavior of Sangai can be easily seen over new shoots on freshly cut fire line area. It exhibits a bimodial activity pattern. Sangai starts grazing usually early morning approximately 4:30 am and generally continue up to 8:00 am. On cloudy morning the period may extend to 10:00 am. In the evening it starts at 3:00 pm and continue up to 6:00 pm. After feeding it takes rest. During day time it rests under thick and tall reeds and grasses. At night some of them even rest on the hillocks.

Sangai has a maximum lifespan in the wild of around 10 years.

Rutting takes place in the early spring months between February and May. Males compete with each other to gain control of a harem of females that they can then mate with. After a 220 to 240-day-long gestation period, normally a single calf is born. The young are spotted at birth; these spots fade as the animal grows. The young are weaned at 7 months of age, and becomes sexually mature from 18 months of age onwards.