Iguana Small 320×189 Medium 640×378 Large 1024×604 Download Tiff Original 2400×1416 | (582.9 KB) Description Reptiles that have tall, flat plates coming out of their back like spines, when adults. A common pet in the United States. They can easily grow up to six feet long, even in captivity. Keywords iguana Galleries Snakes and Lizards Source: Charles C. Abbott, Cyclopedia of Natural History (New York: A. L. Burt, 1888) 507