The lion-tailed macaque is a species of Old World monkey endemic to the Western Ghats mountain range in India. It is a medium-sized primate with a distinctive black mane and a silver-grey coat. The lion-tailed macaque is arboreal and typically found in the evergreen forests of the Western Ghats.

The lion-tailed macaque is an omnivore, feeding on a variety of fruits, insects, and small animals. It is known for its distinctive and loud calls, which are used for communication within the group.

The lion-tailed macaque is listed as an endangered species, with habitat loss and fragmentation due to deforestation and human activities being the major threats to its survival. Conservation efforts, such as protected areas and reforestation projects, are important for the long-term survival of this species.