Sulcata tortoise or African Spurred Tortoises are the largest tortoises of the African mainland, beaten in size only by Galapagos and Aldabra (an african island) giant tortoises. Some are captured for the pet trade, but they grow rapidly when young and are soon too large for most keepers. They are vulnerable and are threatened by habitat loss and grazing competition from livestock, and to some extent capture for eastern medicine.