Chamaeleo jacksonii (common names Jackson's Chameleon or Three-horned Chameleon) is an African chameleon belonging to the chameleon family (Chamaeleonidae). They 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 merumontanus can only be found on Mount Meru and the Arusha Region of Tanzania. The subspecies xantholophus was introduced to Hawaii in the 1970s and has since established populations on all main islands. 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.
