Bison Herding and Other Wonders

I was much struck by a BBC film report of the annual Bison round up in the Black Hills of South Dakota .... this entails cowboys moving the 1,000 animals to a winter pasture .....


Bison Stands Off Wolves 

 

I looked it up, and there are approximately 500,000 bison in captive commercial populations (mostly plains bison), on about 4,000 privately owned ranches .....