The trouble first surfaced about three years ago. Rangers in Pilanesberg National Park, in northwestern South Africa, began to notice that white rhinos were being killed at the rate of about one a month. Then the same phenomenon started happening at Hluhluwe-Umfolozi Park, in the southeastern section of the country. Poachers looking for precious horns are the usual suspects when rhinos turn up dead. But not this time. These animals were left intact, horns and all. Their wounds, moreover, had been caused not by gunshots but by long, sharp objects with some mass to them.
The mystery was soon solved: the...
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