Average weight of the male 30 kg (65 lbs.) and the female 25 kg (55 lbs.) Shoulder height averages at about 75 cm (30 in). Life expectancy is about 10 years.
Medium-sized antelope with a greyish-brown coat and white under belly. The neck and face is reddish-brown, black spots below the ears and the tips of the ears are rounded.
Difference between male and female: Only the male has horns and is larger than the female.
As the name suggests, they are associated with mountainous terrain with enough grass, shrubs and trees for shelter. They prefer to bed down on the slopes which provide a good vantage point. They form small herds of up to 10 individuals although herds of up to 30 has been seen. Grazes during the cool time of the day extending into the night. Will rest during the heat of the day. Freshly burnt areas are a big favourite of them, utilise the new sprouts. They are very alert and when alarmed will make a shrill whistle-like alarm sound before fleeing down-hill. Dependant on water and will drink regularly during warm days.
A single young is born mainly during the summer after a gestation period of 8 months.