Chimpanzee emitting a raspberry call (IMAGE)
Caption
Chimpanzee emitting a raspberry call. These calls show highly flexible usage in communities without role models but stable, settled usage in communities with role models, showing the formation of a signal convention.
Image Credit: Antoine Valet/Tacugama Chimpanzee Sanctuary.
Credit
Antoine Valet/Tacugama Chimpanzee Sanctuary.
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