One more reason why the Angonoka might go extinct would be that the species is concentrated only in one area. They don't seem to be dispersed, meaning anything including intense temperature and illness could wipe the species out. The released bush pig is the principle predator from the angonoka tortoise; https://angonoka-tortoise-for-sal36122.bloggactif.com/41485875/how-much-you-need-to-expect-you-ll-pay-for-a-good-angonoka-tortoise-for-sale