In countries such as South Sudan, the great herds have all but disappeared. But further south, conservation success mean increasing human-wildlife conflict In countries such as South Sudan, the great herds have all but disappeared. But further south, conservation success mean increasing human-wildlife conflict I t is late on a January afternoon in the middle of South Sudan’s dry season, and the landscape, pricked with stubby acacias, is hazy with smoke from people burning the grasslands to