They have most common features like tails, eyelids and long legs. These cold blooded creatures and can live for about 20 years. Most of the breeds of iguanas are found in Central and Sothern America, Mexico, Lesser Antilles Islands, Florida, Hawaii and California. Many varieties of the iguana belong to arboreal category. If they are exposed to sunlight, they get Vitamin D3 calcium and phosphorous from ultraviolet UVA and UVB from sunrays. You can use different types of artificial lights, which produce the ultraviolet rays. However, the sunrays are the best. To make the iguana get sufficient quantity of the vitamins and mineral, they should be able to get exposure to sunlight to maximum possible extent. You can choose an inexpensive enclose for them that has proper air circulation for their comfort. It is possible to install a noiseless small fan to maintain the air flow in the enclosure for iguanas. In addition, you should make arrangement to maintain the temperature and humidity in their cage. The mold should not be allowed to grow. Just examine the body and all parts of iguana you want to select. It should be round and its skin should be free from scars, scratches lumps or bumps. The healthy iguanas are very fast in their movements and will not stay inactive at one place. They will move around in their cage. Giant green iguana is very eager to know everything taking place around him. They like to bask in sun during the day break to get warmth to keep their body at a higher temperature. So you should be able to care of these primary needs when you plan to construct a shelter for them. You can consider some of possibilities for iguana enclosures as discussed below: One of the options is to make a shelter for iguana in a closet. When the food was available again they regained their sizes to normal. The marine iguanas are not as active as the other species of iguanas. If you keep them pet, cat and dogs will attack them and they cannot save themselves. As of date the Ecuador's government has imposed laws aiming to save marine iguanas from extinction.