The major causes are cutting of forests. Consequently, they lose the place to live. Moreover, they fall a prey to animals and human beings also eat them in many islands. However, it is possible to take some suitable steps to avoid their extinction. These measures may include enforcing anti-hunting laws, boosting up their captive generation in zoos, educating the people in the iguana inhabited areas to protect them. Desert Iguana Features: Matured desert iguana is between 10 inch and 16 inch in length. It has a roundish and large body and a long tail. It has a brownish head with a special reddish brown outline like a net. The trunk and the neck have a tan and grayish spots over it. Its tail also has a few whitish and grayish spots. If you are interested in keeping pet iguanas, you should know all the important fundamental principles for bringing them up. The Selection of Iguana: When you buy infant iguanas to make your pet, you should buy the healthy reptiles, which are energetic and lively. The healthy iguana is round in shape and its eyes are also round and shining. The laying of eggs starts in early in August. The eggs will hatch after six months. The hatching is without the parent iguanas. The Rhinoceros Iguana becomes grown up adults in 3 years and they have life span of around 30 years. Rhinoceros Iguanas also get the heat from sun to keep their bodies warm. You can arrange a 30 gallon capacity aquarium for it. Different types and shapes of enclosures can be used for iguana. These can be made from wood, glass, Plexiglas or plastic. Its base should be very clean. You can use newspaper, linoleum or artificial glass at the base. The enclosure should be free from soil, dust, sand or bark. As the iguana grows, you should be able to make changes in the size of its cage rather than shifting it from one cage to another. It is advisable to go for a bigger cage from the beginning. That will provide more freedom to iguana for moving around. Food: Now coming to the food to be given to your pet iguana, naturally it should be given a healthy food.