There are lots of reasons to move a rhinoceros. In Namibia, where one-third of the world’s 5,500 black rhinos live, conservationists must strategically relocate the animals to sustain local populations and encourage genetic diversity. Sometimes rhinos are moved to national parks, where they can be protected from poachers who relentlessly pursue their valuable horns. Others are transported to one of the country’s 86 conservancies, community-managed preserves that can lure more visitors—and generate more poverty-alleviating revenue—with the promise of a rhino spotting. But moving a rhino is a big lift, and…