Composition of the three study groups.

Adult = older than 8 years; sub-adult = 5–8 years; juveniles = 3–5 years; infants 0–3 years; an individual younger than 3 years but whose mother had already another offspring were considered juveniles [54].
*Demographic data for age class classification were not available for older individuals and so individuals were classified based on size. Sub-adults were individuals that moved independently from their mother (i.e. could be found in subgroups where the mother was not present) and were sexually mature, but were not fully adult size.
∧Includes two individuals of unknown gender.