The estimates of elephants in Akagera based on an August 2013 aerial total count survey. The survey was carried out for two days (16th and 17th of August) using a Robinson R44, four seat, helicopter.
Source:Macpherson, D. (2013). 'Report on an aerial census of Akagera National Park, Rwanda - August 2013'. Namitete, Malawi: CLUNY.