The survey of wildlife, including elephants, at Mwea National Reserve. It was carried out on 26th September 2012 using the aerial total count method.It is important to note that the interval between the flight spaces ranged from 0.5 to 2 km instead of 1 km due to the rugged terrain and thick vegetation.
Source:Ngene, S., Kimutia, D., Mukeka, J. and Omondi, P. (2012). "Total aerial census of elephants and other large mammals in Mwea National Reserve". Nairobi, Kenya: Kenya Wildlife Service.