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Chimpanzee Factions Clash in Uganda, Resulting in 28 Deaths

4/14/2026

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Summary

Story summary

Researchers document the first instance of a chimpanzee group splitting into factions among the Ngogo chimpanzees in Kibale National Park, Uganda.
The Western group, initially smaller, gains dominance through coordinated attacks on the Central group.
The attacks result in at least 28 deaths, including 19 infants.
The study, published in Science, notes large group size, resource competition, and the death of key males as factors.

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Story summary

Researchers document the first instance of a chimpanzee group splitting into factions among the Ngogo chimpanzees in Kibale National Park, Uganda.
The Western group, initially smaller, gains dominance through coordinated attacks on the Central group.
The attacks result in at least 28 deaths, including 19 infants.
The study, published in Science, notes large group size, resource competition, and the death of key males as factors.