This is basically due to malnutrition and lack of vitamin D3, calcium and phosphorous in food. You can get the details of the nutritious food advice for iguanas from those selling the pets. Many people like to feed their iguana with crush and lettuce, but they are not aware that it is just like sponge and does not have any nutrition value. Scientifically, Iguanas are categorized as herbivores; as such they should not be fed with green leaves as their primary diet. It is recommended to feed them with worms and other fleshy food rich in animal protein. Maybe, you have watched iguanas on TV eating some insects. The research works show that it is only by chance. There a few distinct features between a male and female iguana. Males carry large fat pockets over their head and have heavier lower jaws. They carry larger femoral pores on the lower side of their thighs. Males have larger and heavier heads. Female iguanas do not have heavy fat pockets on head and their jaws are smaller. In addition, you should make arrangement to maintain the temperature and humidity in their cage. The mold should not be allowed to grow. If it grows remove it by washing using bleach and wiping out. 3. Maintain the temperature in cage during the night and use heating pads to heat up the enclosure. It is also feasible to use low wattage lamps for getting heat. Their skin is rough like rasps and they have pointed scurfs on their back. They possess big claws and long fingers and can effortlessly grasp and climb up. Their Habitat: The baby green iguanas are mostly brought up in the rainforests in tropical regions particularly in places having lower altitudes and approachable water bodies like rivers and streams. This iguana is also known as Galapagos Land Iguana and basically eats plants and cactus. The next varieties, Genus Ctenosauria are spiny tailed iguanas. They are basically natives of Mexico and Central America. Further, they are very small in comparison to other varieties of iguanas and can grow only from 5 inches to 35 inches in length.