The Springbok (Afrikaans and Dutch: spring = jump; bok = antelope or goat) (Antidorcas marsupialis) is a medium sized brown and white gazelle that stands about 75 cm high. Springbuck males weigh between 33-48 kg and the females between to 30-44 kg. They can reach running speeds of up to 80 km/h. The latin name marsupialis derives from a pocket-like skin flap which extends along the middle of the back from the tail onwards. When the male springbok is showing off his strength to attract a mate, or to ward off predators, he starts off in a stiff-legged trot, jumping up into the air with an arched back every few paces and lifting the flap along his back. Lifting the flap causes the long white hairs under the tail to stand up in a conspicuous fan shape, which in turn emits a strong floral scent of sweat. This ritual is known as pronking from the Afrikaans, meaning to boast or show off.Springbok inhabit the dry inland areas of south and southwestern Africa. Their range extends from the northwestern part of South Africa through the Kalahari desert into Namibia and Botswana. They used to be very common, forming some of the largest herds of mammals ever documented, but their numbers have diminished significantly since the 19th century due to hunting and fences from farms blocking their migratory routes.