However, many times, it is hard to distinguish iguanas. Most of the species act different and appear distinct. Some of them possess bright colors and the others have brilliant or dull colors. Every single species of iguanas owns different features because it originates from a different home ground. Iguana as pets: Many people in America are keeping iguanas as their pets. You should not use mud, soil, sand and bark as these will breed pest in them and cause damage to iguanas. You should clean the dwelling of iguana and sterilize it twice every week. You can place a few pieces of rocks, drift woods, broad limbs, branches etc. for climbing of iguanas. Water: Generally, iguanas quench their thirst for water by the vegetation consumed from plants and the food they take. The bush or the plant that they select for their food is precious to them. They will guard it from the other species of iguanas. They spend their lot of time in eating or lying in the sun to get heat. They return to their tunnels and caves or hollow tree trunks at night. 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. Green iguana is recognized as "Bamboo Chicken" and is a favorite delicacy for many people. Appearance of the Green Iguana: The green iguana normally grows between 4' to 6'. Some of them excessively grow and are even 7' in length. Their tail constitutes almost half of their total length. In spite of being green they have a dominant black stripe on the body. They essentially feed on marine algae that are almost imposible to create commercially. Genus Conolophus, have closest resemblance with the marine iguana. This iguana is also known as Galapagos Land Iguana and basically eats plants and cactus. The next varieties, Genus Ctenosauria are spiny tailed iguanas. It helps them to digest their food and stay healthy. You should monitor the temperature in their cage with a thermometer. There should be a warm place to bask with a temperature around 110 degrees Fahrenheit. You can use a spotlight for this purpose. Heat tape, under tank heaters and ceramic lights are some of the other alternatives.