The estimates of elephants at Nkhotakota Wildlife Reserve in 2013 using a ground sample count. The survey only covered a bit more than a third of the Wildlife Reserve (747 sqkm of the 1802 sqkm reserve)between the Bua and Kaombe rivers.
Source:Sichali, E. & Mkumbwa, S. K. (2014). '2013 animal census report'. Nkotakota, Malawi: Nkhotakota Wildlife Reserve.