The relative density and distribution of lechwe. Based on Botswana Department of Wildlife and National Parks aerial surveys, as reported by BRIMP (BOTSWANA RANGE INVENTORY AND MONITORING PROJECT) data sets and Scott Wilson Resource Consultants. 2000. Environmental assessment of veterinary fences in Ngamiland. Report for the Government of Botswana; and aerial surveys by the Namibian Ministry of Environment & Tourism. Origin: Various.