Blue Iguana (2 of 2) (image) Wildlife Conservation Society Share Print E-Mail Caption Ranging between gray and turquoise blue in color, male iguanas become bluer during the mating season. Credit Julie Larsen Maher/Wildlife Conservation Society Usage Restrictions One time usage only. Must use with the following credit: Julie Larsen Maher/Wildlife Conservation Society Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.