a Wolfrider
Wolfriders were creatures of Orc-Kind trained to use Wargs or War-wolves as mounts for battle.
Wolfriders usually were smaller Orcs or Goblins but sometimes also greater Orcs rode on large Wargs.Saruman the White trained a special breed of smaller Uruk-Hai or Half-Orcs able to fully withstand sunlight and completely assimilated to the War-Wargs they lived with.
A different kind of Wolfriders were in the service of Bolg and the Great goblin, the Hunter-Orcs, a breed of savage Fighting Orcs riding Dire Warg mounts.
An Uruk-Warg-Rider