Common lizards are small, non-venomous lizards of perhaps a foot or two in length, such as an iguana. Lizards prefer flight to combat, but they can bite painfully if there is no other option.[2]
Monitor lizards are fairly large, carnivorous lizards ranging between 3–5 feet in length. Monitor lizards can be aggressive, using their powerful jaws to tear at prey or enemies. They can hide well in forested or overgrown areas.[2] Some druids choose them as their animal companion.[3]
Due to the few amount of small lizard-like models, many of the lizard critters found in the World of Warcraft use the warp stalker model; though this is simply a game mechanic, and lizards are in no way related to warp stalkers.