An aerial wildlife census of the Caprivi River Systems in Namibia was conducted between 11 and 20 August 2004. A total count of water bodies and floodplains of the Kavango, Kwandu, Linyanti, Chobe and Zambezi was done to asses the numbers of hippopotamuses, floodplain ungulates, crocodiles, and some large birds. Counting areas were divided into 15km2 blocks and, with the use of GPS and mobile GIS technology, each block was covered intensively.