fang
Admiral
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Male chimps compete for access to small numbers of females, so they have an incentive to kill each other. But rival groups sometimes attack them, so they also have a reason to keep their fellow males around for support. It is a trade-off. This group did not have close neighbours, so the other males may have been less worried about outside threats.
Gang of chimpanzees kills their alpha male
Four lower-ranking chimpanzees have banded together to assassinate their group's leader and take his place
www.newscientist.com