Call combinations in chimpanzees: a social tool?

Maël Leroux, Bosco Chandia, Alexandra Bosshard, Klaus Zuberberbuehler & Simon Townsend
A growing body of evidence suggests the capacity for animals to combine calls into larger communicative structures is more common than previously assumed. Despite its cross-taxa prevalence, little is known regarding the evolutionary pressures driving such combinatorial abilities. One dominant hypothesis posits that social complexity and vocal complexity are linked, with changes in social structuring (e.g. group size) driving the emergence of ever-more complex vocal abilities, such as call sequencing. In this paper, we tested...
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