On the iguanas head there are the ears.. silver circle things.. then they have kinda underneath their ears these slightly larger circles.. i guess they are called " subtympanic shields. " I wanted to know if all iguanas subtympanic shields get like puffed out like they have big tennis balls stuffed in their jaws..because some i saw were flat.. i know it is a weird question. but im curious. do they all get big like that on those green circles??
nicole






