When the world of Calithmer was created, there were many species of human. Of them, there were three of which were to receive the natural gift of flight: The grapiens, the harlarks and the yavarrah. These three were judged and given their resulted territories of the land. Each was given specific traits to be able to survive in their lands. The yavarrah, the least worthy, were given bat-like traits with wings for arms and claws in the middle joint. :They were given reign over the caves of the earth.