Although primates account for only five of the 60 species of land-mammals known from Sri Lanka, they are paradoxically among both the best known and the least known components of the island’s rich fauna. Grey langurs and macaques are often seen on roadsides and around places of worship. Others such as the highland loris and the leucistic purple-faced leaf monkeys, however, are so rare and secretive that only a handful of specimens has been seen in the past ...
