Springbok or springbuck antelope are often refered to as the southern African version of a gazelle but it is not actually a gazelle - hence, the name Antidorcas, which indicates it is not of the Dorcas gazelle family.
The springbok is a unique antelope species because it has a pouch or skin flap along it's back which lifts into a white crest or fan when it does it's display pronking to attract a female. Incidentally this crest of fur briefly rises seconds after the animal is shot and if you sniff closely you may smell an aroma similar to candy floss.