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Dietary richness (number of genera) as a function of time (months of observation) for (A) all food classes and (B) only the frugivorous portion of the diet. Overall diet richness was greater for leaf monkeys (P. rubicunda) than for gibbons (H. albibarbis, A), but the species did not differ in the number of genera of fruits they consumed (B). Error bars represent +/- 1 standard deviation from the mean.
