Fig. 3From: Development of foraging skills in two orangutan populations: needing to learn or needing to grow?Development of Ramble ratios: Average daily ramble ratios for independently ranging immatues (juveniles) and mothers at Tuanan (a) and Suaq (b). The numbers next to the juvenile data points indicate ages (in years). The juvenile points are always paired with a data point of their mother collected in the same 5Â month period (in 3 cases this data was not available)Back to article page