White-handed Gibbon

Activity patterns. Lar Gibbons are diurnal and arboreal. On average, they spend their day feeding (33 %), resting (26 %), traveling (24 %), engaged in social activities (11 %), vocalizing (4 %), and involved in intergroup encounters (2 %), although actual proportions of activities can change significantly over the course of the year. Much of the day is spent foraging and resting. Lar Gibbons in Thailand are active for an average of 8 - 7 hours / day, leaving their sleeping sites around sunrise and entering sleeping trees an average of 3 - 4 hours before sunset. If the morning is clear before dawn, an adult male emits his solo calls, usually from his sleeping tree. At sunrise when all members of a group awaken, they defecate and urinate while hanging from a branch. The group then movesto a feeding tree. There is normally a duet call among the adult pair before noon, and the rest of the day is spent alternating between feeding and traveling to new trees to feed. With seasonal reductions in the amount of available fruit, feeding time increases and correspondingly less time is spent in social activities. The group usually pauses each day for about an hour of rest and social activities. Lar Gibbonstry to avoid notice when moving to sleeping sites, possibly as a way of reducing predation. Often the tallest trees available are chosen as sleeping sites, if possible located on steep slopes or cliffs. During the cool season, groups of Lar Gibbons can often be found in large fig trees for up to several hours a day.