UTAH — Bison roundup: A bison was locked in place while receiving vaccinations and health screenings during the bison annual roundup, on Tuesday, on Antelope Island. This year, about 750 bison were pushed into corrals during the Bison roundup. The animals are rounded up each fall so they can receive health checkups and vaccinations and be affixed with a small external computer chip that stores health information. They are then released back on the island or sold at a public auction to keep the herd at a manageable level of about 500. Photo: Rick Bowmer/AP