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Violent chimpanzee attack - Planet Earth - BBC wildlife
Lethal chimpanzee attacks on gorillas seen for first time in the wild - CNN
Chimpanzee group aggression against alpha male (UPDATED)
CHIMPANZEES KILLS GORILLAS | Rare Video Of Chimps Attacking ... - YouTube
Why Are Chimpanzees and Gorillas Suddenly Going to War?
Gombe Chimpanzee War - Wikipedia
Why do chimps kill each other? | Science - AAAS
Gang of chimpanzees kills their alpha male - New Scientist
Gorilla vs. Chimpanzee: Who Wins in Their Battle and Why Do They Fight …
While Some Chimps Go Low, Others Go High to Avoid a Dangerous Fight