Chimpanzees in Uganda locked in vicious ‘civil war’, say researchers BBCThese Chimps Began the Bloodiest ‘War’ on Record. No One Knows Why. The New York TimesTwo hundred chimpanzees are embroiled in a ‘civil war’ Scientific AmericanScientists stunned as chimpanzees turn on friends in killing spree ReutersWhy these chimps have been at war for 8 years National Geographic
