Jackson's chameleons are native to the humid, cooler regions of Kenya and Tanzania, East Africa, found in great numbers at altitudes over 3,000 m. The subspecies xantholophus was introduced to Hawaii in the 1970s and has since established a large feral population. This population was the primary source of Jackson's Chameleons for the exotic pet trade. However, the exportation of these animals (and many others) from Hawaii for the pet trade has been made illegal to prevent opportunists from willfully establishing further feral animal populations in order to capture and sell them.
The Jackson's chameleons in this book were found in trees in my garden in Waikoloa on Hawaii's Big Island's leeward side at around 900 ft. elevation. This is a very dry area, however, our plants and trees are lush because of our watering system.