The Fiji banded iguana (Brachylophus fasciatus) is an arboreal species of lizard endemic to some of the southeastern Fijian islands. It is found in Tonga, where it was probably introduced by humans. It is one of the few species of iguanas found outside of the New World and one of the most geographically isolated members of the family Iguanidae. Populations of these iguanas have been declining over the past century due to habitat destruction, and more significantly, the introduction of mongoose and house cats to the islands.