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Updated: May 23, 2025
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Behavioral Assessment of Manual Dexterity in Non-Human Primates
Published on: November 11, 2011
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Chimpanzee drumming shows rhythmicity and subspecies variation
Vesta Eleuteri1, Jelle van der Werff2, Wytse Wilhelm3
1University of Vienna, Department of Behavioral and Cognitive Biology, 1030 Wien, Austria; University of St Andrews, School of Psychology and Neuroscience, KY16 9JP St Andrews, UK.
Current Biology : CB
|May 10, 2025
Summary
Wild chimpanzees exhibit rhythmic drumming with non-random timing and isochrony, suggesting ancient origins of musicality. Regional drumming variations were observed between western and eastern chimpanzee subspecies.
Area of Science:
- Evolutionary biology
- Ethology
- Bioacoustics
Background:
- Rhythmic percussion is a universal human cultural trait, potentially an early form of musical expression.
- Human drumming features individual/regional variation and structural elements like non-random timing and isochrony.
- Comparative studies of ape drumming can illuminate the evolutionary roots of human musicality.
Purpose of the Study:
- To investigate structural musical features and regional variation in wild chimpanzee drumming.
- To determine if chimpanzee drumming exhibits non-random timing and isochrony.
- To explore the integration of drumming within chimpanzee pant-hoot vocalizations.
Main Methods:
- Analysis of drumming performances from wild chimpanzees across different regions.
- Rhythmic analysis of drumming bouts, focusing on inter-hit intervals and timing.
- Examination of the temporal relationship between drumming and pant-hoot vocalizations.
Main Results:
- Wild chimpanzees demonstrate drumming with non-random timing and isochrony, similar to human musical features.
- Significant subspecies-level regional variation in drumming rhythm was identified.
- Western chimpanzees drummed more isochronously, with faster tempos and earlier integration into vocalizations compared to eastern chimpanzees.
Conclusions:
- Chimpanzee drumming on instrumental substrates shares species-level structural features with human musicality.
- Stable, subspecies-specific regional differences in drumming exist, suggesting evolutionary divergence.
- These findings support the hypothesis that rhythmic drumming on instrumental substrates predates the last common ancestor of humans and chimpanzees.
