An aerial survey of wildlife and domestic livestock took place in the Caprivi from 29 May to 8 June 2013. A total area of 16733 km2 was sampled at an average intensity of 12.7%. The estimates of numbers of each species (with their 95% confidence range) are given in the table below. The population of elephants has increased at an average rate of between 1.4% and 8.3%.per annum. However, the ratio of carcasses to live elephants indicates a possibly unsustainable number of animals being killed in much of the Caprivi.