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Delacour's Langur Video Stock Footage
In previous decades, Delacour's langurs were reported to live in troops of up to 30 individuals, often including a mix of males and females, although single-male groups are more common, and some small all-male groups have also been reported. In more recent years, the typical group size seems to be much smaller, with only about four to 16 members each. Males defend the troop's territory from outsiders, often standing watch on rocky outcrops. When potential rivals are spotted, the males in a troop initially try to intimidate them with loud hoots and visual displays, resorting to chasing and fighting if this fails. Within the group, social bonds are maintained by grooming and play. Despite living in forested habitats, Delacour's langurs are primarily terrestrial, only occasionally venturing into the trees. They swing by their hands when travelling through trees, and use their tails for balance when scrambling over steep rocky terrain, which may allow them to move more rapidly than other related lutungs.
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