The Rhinoceros Iguana is a beautiful and unique looking lizard.The rhinoceros iguana gets its name from the outgrowths, like horns, on the end of its nose. It is a powerful lizard with a long tail. It is cold-blooded, like other reptiles, and must bask in the sun before it can become active. Dusky-grey or olive-green with dark cross bands that are often barely visible. There are three bumps on the snout. These bumps are more pronounced in males. The average size is about 2-2.5 feet in length.