Figure 4: Gould, J. L. and Gould, C. G. (1999) The Animal Mind, Scientific American Inc. ©
Figure 4 : Gould, J. L. and Gould, C. G. (1999) The Animal Mind, Scientific American Inc.
Figure 4 Alarm calls made by infant, juvenile and adult vervet monkeys in response to sightings of birds of prey (raptors) and non-raptors. The number of calls cited for each age group refers to the total number of calls that were analysed