The green iguana or common iguana is a large mostly plant eating species of lizard living in Mexico, Central and South America plus the Caribbean islands. They are very common throughout Puerto Rico and considered as a pest. In the United States feral populations exist in South Florida (including the Florida Keys), Hawaii, and the Rio Grande Valley of Texas. It has adapted significantly because of their speed and ability to climb trees. It grows up to 4.9 feet (1.5 meters) in length from head to tail with bodyweights upward of 20 pounds (9.1 kg). We have been down in South Florida for about two and a half weeks and this was my first walk into the swamp. This Iguana was about 4 feet long (1.2 meters) and very aggressive. He had two elderly ladies cornered on the boardwalk. One had bright red sneakers! Iguanas have very sharp claws for climbing and I cropped this photo so you could checkout the claws. We got the ladies on their way and the Iguana folded his legs back to relax in the sun. I have not seen the blue color on his shoulders before and because the first four spines behind the blue area are damaged, the blue area may be damaged skin from a fight or mating ritual. Some info from Wikipedia. Best details in zoom.. Thanks for stopping by, taking a look and for all your previous favs and comments. They are very much appreciated. Dana