Dr Cleve Hicks from the University of Warsaw in Poland has been observing a special group of chimpanzees that have developed their own customs and traditions.
 
Despite the logistical difficulties involved in reaching a remote part of DR Congo , as well as the ever-present threat of malaria and the dangers of armed conflict, Hicks and his team managed to document how these chimpanzees live – including tool making, feeding habits and sleeping style.   

Read the original article: https://doi.org/10.1007/s10764-020-00149-4