Wargs are a species of wolf, or wolf-like animals related to wolves but bigger and even more intelligent (Sometimes speaking in their own language). They generally antagonizing, and sometimes they allie themselves with Orcs and Goblins, and other enemies; even acting as their mounts.
It is uncertains as to how wargs came to be; some say they are spiritual creatures like Balrogs, others say they were corrupted and/or bred that way; either as spirits or as real animals. Thou it's possible they may have started out this way as regular animals that already had their own intelligence who may well chose to do what they do, or were tought that way with trainning from Sauron.
Another possibility is that they might even be werewolves; beings that are spirits of Maiar or otherwise which were put into bodies of wolf-like form (Thus they are not the shapeshifting kind we're familiar with) or descendents of werewolves, or even from a corrupted breed maiar wolf-hounds.
- Like Trolls, Wargs were creatures of Norse mythology; and are sometimes referred to as "Varg" or "Vargr" and the name is also an Old English word for "Wearg" or "Wearh"
- While they even speak in their own tongue, it's also been said that wargs also speak in Orkish, Elvish, Black Speech, Westron and other possible languages.
- Logan and his crew encountered wargs once in Middle-Earth with Bilbo Baggins, Gandalf, and Thorin's Dwarves in Logan Meets The Hobbit. They were steeds for goblins that ran after them from mountains.
- Saruman, the wizard of Isengard, has packs of great wolves his own, similar to wargs.