The oribi reaches nearly 50–67 centimetres (20–26 in) at the shoulder and weighs 12–22 kilograms (26–49 lb). This antelope features a slightly raised back, and long neck and limbs. The glossy, yellowish to rufous brown coat contrasts with the white chin, throat, underparts and rump. Only males possess horns; the thin, straight horns, 8–18 centimetres (3.1–7.1 in) long, are smooth at the tips and ringed at the base.
Typically diurnal, the oribi is active mainly during the day. Small herds of up to four members are common; males defend their group’s territory, 25–100 hectares (62–247 acres) large. The oribi is primarily a grazer, and prefers fresh grasses and browses occasionally.
Males defend their group’s territory, 25–100 hectares (62–247 acres) large; female members may also show some aggression and drive away intruders. A study showed that the number of females that visit the male’s territory depends on the appearance (particularly the symmetry) of the male’s horns. Males mark vegetation and soil in their territories by preorbital gland secretions and excrement; the intensity of marking increases with the number of male neighbours.
