Elsevier

Animal Behaviour

Volume 28, Issue 4, November 1980, Pages 1070-1094
Animal Behaviour

Vervet monkey alarm calls: Semantic communication in a free-ranging primate

https://doi.org/10.1016/S0003-3472(80)80097-2Get rights and content

Abstract

Vervet monkeys (Cercopithecus aethiops) at Amboseli, Kenya, give acoustically different alarm calls to different predators. Each alarm evokes contrasting, seemingly adaptive, responses. Animals on the ground respond to leopard alarms by running into trees, to eagle alarms by looking up, and to snake alarms by looking down. In a 14-month field study examining the semantic properties of alarm calls, we played tape-recorded alarms to vervets in the absence of actual predators and filmed the monkeys' responses. Playbacks confirmed observations and showed that (1) alarm length, amplitude and alarmist's age/sex class had little effect on response quality, and (2) context was not a systematic determinant of response. We conclude that vervet alarm calls function to designate different classes of external danger.

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