In the past three years, gun battles between rhino poachers and the Zimbabwe National Parks and Wildlife Authority (ZimParks) rangers have killed about 20 people. Wildlife economists say a country like Zimbabwe, which has a large rhino population, needs to continue to remain alert as the endangered species to be under threat from poachers. According to America-based wildlife organisation, World Animal Foundation, the rhino horn is estimated at US$65 000 per kg, which is more than the value of gold or diamonds.