similarities to the Serengeti

I am taking a day in town between trips for International Mountain Guides, facilitating two of their Kilimanjaro/safari trips. We climb Kibo in 7 days and finish up with 3 days of safari on the Serengeti.
As I was bouncing along, looking out over the square miles of the plains, forests and sparse wetlands (we are here in the dry season), I was struck by the similarity of the Tanzanian parks and their vision, with America and ANWR.
The Serengeti, it appears was established to protect the migration of the wildebeast. My first response was, "Why just one animal?" This migration is like a convention coming into town. A year's business is done then. Often, every animal is benefiting from it.
It appears there are several layers of protection, from allowing herding, to residence, to hunting. However, let me tell you, these protected areas are a BIG place.
In ANWR, the coastal plains are the calving place for the cross continent Caribou migration. If we wanted to set up some form of preserve.... that would be one.
I do another safari after one more Kilimanjaro climb. I will focus my attention on the development and layout of the preserves.
Sorry no pictures, my camera did not make it into the luggage, but it was spectacular to watch two of the last remaining 20 some black rhinos feeding off in the distance. I felt it was fitting, somehow, to only see them from afar.