ut across the plains of South Dakota, over 1,500 bison (Bison bison bison) were rounded up recently as part of efforts to protect the species and maintain the health of the herd. Every year, the Custer State Park holds this annual health check to make sure the bison are thriving and help to vaccinate the year's new calves. Moving these animals, where the males can reach as tall as 1.82 meters (6 feet) and weigh approximately 900 kilograms (2,000 pounds), is no small matter – and keeping the species safe is vitally important. Bison used to be plentiful across the...