The function and mechanisms underlying baboon ‘contact’ barks

Abstract

Free-ranging baboons,Papio cynocephalus ursinus, in the Okavango Delta, Botswana, often give loud ‘contact’ barks when separated from other group members. Although these calls appear to function to maintain contact between widely dispersed animals, individuals apparently do not give contact barks with the intent of informing others of their location. Females are more likely to give a contact bark in the 5 min after they themselves have called than in the 5 min after another female has called. Playback experiments suggest that females primarily ‘answer’ their close relatives' contact barks when they themselves are separated from other females or at the end of the group progression.

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