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
Dwarf flat lizard blue. The sides are blue like the belly, but are green or blue when immature. When the underneath a tree they start to change colors. This lizard lives in isolated populations in Limpopo, South Africa, which may extend into eastern Botswana. The Dwarf Flat Lizard lives in arid and mesic savannahs. This species also occurs with Platysaurus minor, the Waterberg Flat Lizard The Dwarf Flat Lizard lives in small family groups and is very agile. Dwarf Flat Lizards lay two white eggs during October and December. Dwarf flat lizard The Dwarf Flat Lizard is a lizard in the Cordylidae family.