Grey rhebok

A female at the San Diego Zoo

Male grey rhebok browsing

The grey rhebok is a medium-sized antelope weighing 19–30 kg (42–66 lb) with a long neck and narrow ears. The coat is short and dense and coloured in various shades of grey. Only the males carry horns, which are straight, sharp, ringed at the base, and around 15–25 cm (6–10 in) long.[2]

Generally confined to the higher areas of Southern Africa, they typically inhabit grassy, montane habitats - for example, sourveld - usually 1000 m above sea level, and carry a woolly grey coat to insulate them from the cold. They are not strictly limited to this habitat as they can be found in the coastal belt of the Cape, almost at sea level.[2]

The grey rhebok is territorial and maintains its territory by urinating and defecating, standing or walking in an upright posture, and patrolling. Males become extremely aggressive during the breeding season. The grey rhebok usually aggregates in herds of one to 15 females and young and one mature male. This species is therefore polygynous. The grey rhebok is a seasonal breeder,[2] with mating taking place between January and April. Females are pregnant for about seven months, and give birth to a single calf in late spring and summer (November to January in the Southern Hemisphere).

This species is a browser, and gets most of its water from the food it eats, so it can utilize food sources a long distance from standing water.[1]

The grey rhebok is listed as Near Threatened,[1] with the population estimated to be at least 2,000 individuals in protected areas and perhaps as many as 18,000 in unprotected areas. The uncertainty regarding the exact number is due to extensive areas of the species' range not having been surveyed or where estimates are unavailable.

The Dutch spelling of the species, reebok (a mature male ree), lends its name to the British-American sportswear manufacturing company Reebok.[3]