Science Advances

This PDF file includes:

• Fig. S1. Percentage of time in locomotor play at different tree heights.
• Fig. S2. Percentage of different play patterns at different ages.
• Fig. S3. Validation of photogrammetric measurement.
• Fig. S4. Differences between solitary and social locomotor play in locomotion intensity.
• Fig. S5. The proportion of social on all locomotor play was positively related to age and the number of potential play partners around.
• Fig. S6. Period overlap for monthly growth rate calculation.
• Fig. S7. Energy trade-off between social locomotor play and growth.
• Fig. S8. Time budget analysis: Sex differences in time spent in locomotor play were due to sex differences in resting time, not feeding time.
• Fig. S9. Latencies of motor skill acquisition as a function of average intensity and time spent in locomotor play before acquisition.
• Table S1. List of the 18 motor skills used in this study.
• Table S2. Percentage of time spent in locomotor play (mean ± SD) for each sex and age.

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