A white rhino grazes in protected land in the Borana Conservancy in Kenya. This second largest land mammal is particularly vulnerable to poaching for its horn because it is relatively unaggressive and lives in herds, according to the WWF. Photo: Tessa Chan
A white rhino grazes in protected land in the Borana Conservancy in Kenya. This second largest land mammal is particularly vulnerable to poaching for its horn because it is relatively unaggressive and lives in herds, according to the WWF. Photo: Tessa Chan