Utah study shows cattle, rabbits graze more By SARA GIBONEY UNK Communications KEARNEY – An estimated 30 to 50 million bison once roamed North America before unregulated shooting reduced the population to about 1,000 by 1900. Because of conservation efforts, today there are approximately 500,000 bison, including a small herd in the Henry Mountains of Southern Utah. The herd, which is free ranging, genetically pure and disease free, is instrumental in bison … [Read more...] about Ranglack earns prestigious Southwood Prize for bison research