First of all, Asian elephants should not be kept with African elephants. The two species should be kept separate. That way, you don’t find an African dying of a disease that only Asians have. Elephants do not require a large area. Yes, they migrate long, long distances in Africa, not because they have to but because they have to get food or water. If they get the food or water in one place, they stay around. They don’t wander aimlessly. Same species, separate from the other species.