There is a considerable variation in the potential adult size of green iguanas, depending on the country of origin and the conditions by which they live. As a main rule for iguanas they usually will achieve a length of four to five feet, with occasional specimens reaching a length of six feet. Some males of South American populations can reach a length of nearly seven feet and weigh up to eighteen pounds.

acteristics of green iguanas. Males grow larger than the females, but are not as heavy bodied as females. In general, males develop larger dorsal crests and have larger scales beneath the tympanum than females. However, some females have enlarged scales beneath the tympanum as large as that of some males. In older iguanas, at least two years old, the femoral pores of males will be significantly more enlarged than that of females and will produce femoral pore secretions that resemble enlarged scales. Older males will also develop broad enlarged jowls which are definite signs of a male.

Green iguanas have several specific behavior patterns. Iguanas lick everything. They do this to test their environment. By licking, they can determine where they are at in their environment. Iguanas also open their mouth as a warning and as an aggressive act. Sometimes, though, when they open their mouth it’s because they are hot or sick. They also bo

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