This primate, found only in Sri Lanka, is a highly intelligent and endearing monkey that lives in groups of around thirty individuals, with highly hierarchical intra-group relationships that the Sri Lankans compare to the caste system in India.

This primate, found only in Sri Lanka, is a highly intelligent and endearing monkey that lives in groups of around thirty individuals, with highly hierarchical intra-group relationships that the Sri Lankans compare to the caste system in India.