A symbol of Silent Valley, the Lion-tailed Macaque is a good climber who spends a majority of its life in the upper canopy of tropical moist evergreen forests. Unlike other macaques, it avoids humans. It lives in hierarchical groups of usually ten to twenty animals, which consist of a few males and many females, defending its area first with loud cries towards the invading troops. Endemic to South India, it is one of the most endangered species of primates in this region. Its distribution is restricted to some pockets of evergreen forests. It has viable populations in Thenmala and Silent Valley areas, the total population being less than 2000. Macaque's hair is dark-brown or black and has a silver-white mane.