The White Rhinoceros or Square-lipped rhinoceros is one of the five species of rhinoceros that still exist and is one of the few megafaunal species left. It has a wide mouth used for grazing and is the most social of all rhino species. The White Rhino consists of two subspecies: the Southern White Rhino, with an estimated 17,480 wild-living animals at the end of 2007 (IUCN 2008), and the much rarer Northern White Rhino. The northern subspecies may have 7 remaining worldwide— all captive 1 male and 6 females, which are out of breeding age