Most often the morning dew. It is not unusual for morning dew to collect on a lizard's body, and some of them, such as geckos, just use their tongues to lap it up off their own faces.
Water
water.
Some lizards drink some don't it may vary on its Breed. Majority of Lizards are insectivores meaning they eat insects as their meal and sources of water too(like its juices inside)
