Skinks are definitely not poisonous. Although some lizards have poison glands (beaded lizards, gila monsters, and it is now known that some monitor lizards produce poison) none are poisonous if eaten. In fact, I know of no reptile (an obsolete taxon, but It's the best thing to call them for know...) that is poisonous in itself, if eaten. However, box turtles have been known to be toxic if they have been feeding on poisonous mushrooms. Its the amphibians, particularly toads and newts, that can be toxic....in some cases, very, very toxic (tetrodotoxin- fatal at 4 mcgs!) Take care, Eric ( I have 2 leopard geckoes, too many snakes, including a batch of corn snake eggs that have yet to hatch, 2 Russian tortoises, an overgrown redear slider, and a wife with a PhD in herps....)