The Fijian Banded Iguana is considered a national icon by the government of Fiji like the beaver is to Canada. It is found on the more southern Fijian islands and is an arboreal species. Male banded iguanas have blue or white stripes on a bright green base while females are more uniformly green with occasional faint banding or spotting. Both sexes have yellow underbellies and yellow rimmed nostrils. Like other iguanas they are able to change colour to blend in with their surroundings. They can grow up to 60 cm long (about half of this would be tail). This species of iguana is omnivorous, eating leaves, flowers and insects.
This photo was taken by miss Calder of me and Liam getting friendly with the banded iguanas as you can see here they are very friendly !
The Fijian crested Iguana is a very endangered species of iguana and is found on the north-western islands of Fiji. It was once known to be on 14 of the Fijian islands but is currently only found on 3. The crested Iguana is a brilliant green colour with 3 white stripes that are sometimes edged with black. These iguanas can grow up to 75 cm long. They have distinctive crests lining the length of their backs. Each spine on the crest can grow up to 1.5 cm long. They have long, strong claws which makes them very good at climbing. The Fijian crested Iguana is herbivorous eating leaves, shoots, flowers and roots.
The main method of speciation in this situation would be ecological isolation. Different islands have different sources of food. This would be the cause of the different diets of the two species of iguana. Depending on how much vegetation was available, the banded iguana would have adapted to this and developed the ability to eat insects. The predator situation would have also been different on different islands. Depending on the presence of mongoose and feral goats, different defence mechanisms would have developed. The colour changing in the banded iguana and the crests on the back of the crested iguana would have been used to blend in or as an attempt to intimidate the threat. Many other factors would have affected the evolution of both species to create the separate ones but the main method through which it happened is the fact that they were on different islands and not facing the same situations. This is what ecological isolation is. Therefore as you can see everything plays a role the food weather predators everything I believe ecological isolation would be the best possible way to preserve these amazing banded iguanas.
A close up view of the banded iguana