300 donated bison grew to over 2,000, helping restore Oklahoma prairie

In 1993, Kenneth and Dianna Adams donated 300 bison to The Nature Conservancy, initiating prairie restoration efforts. The Joseph H. Williams Tallgrass Prairie Preserve now supports thousands of bison, influencing plant diversity and wildlife habitats. Bison grazing and controlled fires together help maintain the ecological balance of this rare grassland ecosystem. Less than 4% of the original tallgrass prairie remains due to agricultural shifts and urban development.