Werewolves

In the First Age, werewolves were servants of Morgoth bred of wolves and inhabited by dreadful spirits, imprisoned so by Sauron. Unlike werewolves of other literature, these did not transform from man to wolf at night, and their behavior had no lunar influences.
Werewolves inhabited Tol-in-Gaurhoth, which became known as the "Isle of Werewolves".
== History ==
The progenitor of all werewolves was Draugluin at Tol-in-Gaurhoth, and the greatest werewolf after him was his descendant Carcharoth, guardian of Angband. The form of the werewolves was first fashioned by Sauron, their lord, who took the shape of a great wolf himself at least once.
Gandalf suggests in conversation with Frodo Baggins, after the events at the Ford of Bruinen, that werewolves survived into the Third Age, and makes a distinction between them and Wargs.
== Characteristics ==
The werewolves of Arda were not shape-shifters, and were always in the form of great beasts. They were similar to wolves and the later wargs, but were as intelligent as Man, rendering them capable of negotiating and communicating with others. Carcharoth apparently had a venomous bite; it is unknown if this was a common trait of the species or if was related to his status as the werewolf destined and designed to slay Huan.