Viral Infection: Many death of iguana occur due to the viral infection in iguana. The research is still on to find the causes and treatments for this virus. Organ failure: The natural aging process results the failure of organs. In some cases, there is bacterial infection that causes the failure. The predominant signs are loss of weight and appetite, bloating and even death. The Red iguanas belong to terrestrial category and spend time in search of food within a short distance from their domicile. They cannot travel long to find any other suitable dwelling place as they easily get disjointed. The female red iguanas lay eggs in burrows dug by them in hot sunny areas. They cover their eggs and leave them unguarded. The young iguana will also grow faster to a larger size with proper food and environment. 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. Many people get attracted by these cute creatures and get involved with them to keep them as pets. It is a fact that these tiny animals can turn very large very soon and may also become aggressive. However, they are generally good pets and you have to take their proper care for food and living. If you want to keep them as pets, it is better you acquire some basic knowledge about the nature of iguanas, the way they live, their habits, food, behavior and what are the necessities for their existence. The desert iguana mostly finds refuge in bushes and it is lives on vegetables, fruits, buds, flowers and leaves of perennial and annual plants found in the desert. It is categorized as herbivores. It relishes the yellow flowers on creosote bush. It is also known to eat the insects, worms and feces of desert lizards, mammals as well of carrion. This signifies that they should be considered only vegetarian. Their food should consist of mostly vegetables or fruits with high nutritional level including collard green and leafy mustard. You can also feed them lettuce, but it should not be on regular basis. Most of the salad lettuce does not have any nutritional degree.