Abstract
It is known that many endemic mammals lived in the islands of the world during Pleistocene to the present. In this paper, the distribution of faunas and their transition in the islands of the world are examined. As a result, it became clear that many of mammals of the islands were converted after the late Middle Pleistocene and became unique. Because animal migration occurs in their habitat environment, it is thought that these animals migrated through the land bridge that was formed in the late Middle Pleistocene, and then an endemic fauna was formed after that was isolated to the island by the sea level rise of 1,000 m.