Chad Kremer, the Bison Herd Manager for Custer State Park, cracks his whip helping run the bison down a hill during the 58th annual Custer Buffalo Roundup on Friday, Sept. 29, 2023, at Custer State Park in Custer, S.D. Cowboys and cowgirls in South Dakota are rounding up a herd of more than 1,500 bison, sometimes called buffalos in the U.S, as part of an annual effort to maintain the health of the once-threatened species. (Matt Gade/Rapid City Journal via AP)