Behavioral observations of wild gray gibbons (Hylobates muelleri) in northern Borneo, part 3

Social behavior

Fig. 17. Two gibbons resting.

　
Fig. 18. Unusual handshake position.
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Fig. 19. Social grooming.

　
Fig. 20. One gibbon touching another one's back.

Fig. 21. Gibbon resting on a branch while another gibbon touches its shoulder.

Fig. 22. The young gibbon is holding the infant back by its dorsal fur.

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