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Related Experiment Video

Updated: Jun 28, 2026

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Published on: November 11, 2011

A lethal incident during an intergroup encounter in bonobos.

Miguel Gareta García¹, Lillian J Fornof², Kris H Sabbi²

¹Department of Human Evolutionary Biology, Harvard University, Cambridge, 02138, USA. miguelgaretagarcia@fas.harvard.edu.

Scientific Reports

|March 24, 2026

Summary

Aggression during bonobo intergroup encounters can be lethal. In one case, an attacked mother

Keywords:

Aggression Bonobo Community Intergroup encounter Out-group

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Last Updated: Jun 28, 2026

Behavioral Assessment of Manual Dexterity in Non-Human Primates

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Published on: November 11, 2011

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats

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Published on: January 18, 2013

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress

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Published on: July 4, 2013

Area of Science:

Primate Behavior
Ethology
Conservation Biology

Background:

Bonobo communities exhibit complex intergroup dynamics, ranging from tolerance to aggression.
Intergroup encounters in bonobos (Pan paniscus) can lead to unpredictable social interactions.

Purpose of the Study:

To document a rare case of infant acquisition following aggression during a bonobo intergroup encounter.
To highlight the potential lethal outcomes of intergroup aggression in bonobos.

Main Methods:

Direct observation of a bonobo intergroup encounter at the Kokolopori research site, Democratic Republic of Congo.
Detailed recording of social interactions, including aggression and subsequent infant care by unrelated individuals.

Main Results:

An adult female bonobo was aggressed by a coalition from a neighboring community.
Her infant was subsequently carried by unrelated immature and adult females from the aggressing community.
The infant died the following day and was carried by the adult female for two additional days.

Conclusions:

Bonobo intergroup encounters can have severe, even lethal, consequences for infants.
This case underscores the complex and often unpredictable nature of bonobo social dynamics and intergroup relations.