Lizard heads called the parietal eye, a basal ("primitive") feature also present in the tuatara. This "eye" has only a rudimentary retina and lens and cannot form images, but is sensitive to changes in light and dark and can detect movement. This helps them detect predators stalking it from above. Until 2006 it was thought that among lizards, only the Gila monster and the Mexican beaded lizard were venomous. However, several species of monitor lizards, including the Komodo dragon, produce powerful venom in their oral glands. Lace monitor venom, for instance, causes swift loss of consciousness and extensive bleeding through its
Italian wall lizard America have been documented from Topeka, Kansas, Long Island, New York and Greenwich, Connecticut. Italian wall lizard The Italian wall lizard, ruin lizard, or İstanbul lizard (Podarcis siculus from the Greek meaning 'agile' and 'feet') is a species of lizard in the family Lacertidae. "P. siculus" is native to Bosnia and Herzegovina, Croatia, France, Italy, Serbia and Montenegro, Slovenia and Switzerland, but has also been introduced to Spain, Turkey, and the United States. "P. siculus" is the most abundant lizard species in southern Italy. "P. siculus" gained attention in 2008 following the publication of a research study that detailed distinct