The iguana's sense of smell is more developed than its eyesight. An iguana's 3D vision is not as good as that of humans, its eyes are on the sides of its head so it does not have binocular vision. The brain of an iguana is capable of receiving 2 completely different visual images from each side and making sense of them. It is possible that, as a result of being cold blooded, an iguana's range of hearing changes depending on temperature. It speeds up when it is warm, and slows down when it is cold.
Iguana iguana is a wonderful swimmer.
It holds its legs close beside it and uses its tail to propel itself through the water. A survival tactic used by young males who have reached sexual maturity but who are not yet able to compete successfully against bigger males, is to delay adopting breeding colors. This tactic is found in many different species throughout the animal kingdom. References Alberts, A., N.Pratt, and J. Phillips. Burghardt, Gordon M. and A. Stanley Rand.