The term Wolves is the name that the Calla folken give to the green-cloaked predators who sweep out of THUNDERCLAP every generation to steal one of each pair of prepubescent twins born in the BORDERLANDS. The Wolves ride gray horses and wear masks which look like the faces of snarling wolves, yet their bodies resemble those of giant men. As we find out at the end of Wolves of the Calla, the Wolves are actually robots.