You have to maintain the temperature in their enclosures. They need constant warmth for their body as they are cold blooded creature. You will have to install lamps or heaters to keep them warm in cold areas. Pet and Tamed iguana. You cannot tame your pet iguana so easily. You have to take their proper care and interact with them so that they feel comfortable and get acquainted with you and your family members. Male Rhinoceros Iguana are always on the guard against their predators and they will keep a watch from the top of tree or a rock while bathing in sun. This species is terrestrial type. Males are mostly aggressive to the rest of male species in their territory. They signal to each other by bobbling their heads and keep in touch. The main food of desert iguana is flowers and leaves of many bushes. In order to control its body temperature, it will change its color from gray to clear white. It will have a darkest color in the morning when it is cold and gradually it turns its color to whitish in the afternoon to avoid feeling very hot. However, it will depend on how they are fed and taken care. Initially, iguana belongs to a humid and tropical climate. These are very energetic creatures in sunlight. When these reptile perceive any danger, they use their defense tools comprising their strong tail, claws, jaws and nails to protect themselves. If you can set a few branches in their shelter, they will feel homely and climb them. The branches should be steady and should not give way due to the weight of your pets or if they lay down on the branches. 2. Temperature: It is essential to keep the baby iguana moderately warm so that they remain healthy and well. In Isabella and Fernandina, you can get the biggest marine iguanas of complete Galapagos Islands. There are smallest marine iguanas living in Genovesa. Marine iguanas are classified as poikilothermic creatures. They can spend only a short time in cold water of sea when they dive in search of their algae food.