I believe there are now over 200,000 North American Bison; a far cry still from the 30 million that spread across the plains before the European settlers arrived on the scene, but a viable number never the less. I would love to see a large herd. A shame that the Passenger Pigeon could not be saved; are there any preserved in the museums? Perhaps it is a suitable case for cloning one day using DNA from the dead tissue. Could Jurassic Park ever become a reality?