Humphrey the Chimpanzee (IMAGE) Duke University Caption Humphrey was a top-ranking male chimpanzee in Gombe National Park, Tanzania, in the early 1970s and known for his frequent attacks on other chimps. Tensions between Humphrey and his southern rivals Charlie and Hugh may have triggered the only known civil war in wild chimpanzees, researchers say. Credit Photo by Geza Teleki Usage Restrictions Must Credit Geza Teleki License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.