Today, Denver Parks and Recreation (DPR) recognized the donation of 33 American Bison to the Northern Arapaho Tribe, Cheyenne and Arapaho Tribes and Tall Bull Memorial Council to reintroduce wild …Today, Denver Parks and Recreation (DPR) recognized the donation of 33 American Bison to the Northern Arapaho Tribe, Cheyenne and Arapaho Tribes and Tall Bull Memorial Council to reintroduce wild …