The other half is the long-term average diet. It's like a tape recorder — it's locked in and doesn't change after that.

Part of the problem with the elephant is, we need to know how much space they really need.

The human/elephant conflict is that they both want to occupy the same land. If humans and elephants are going to coexist, you need to know how much space elephants need, and why they move. A lot of them do move, and for some of them, it certainly appears, it could have to do with food.