Reptiles and Amphibians Q&A 16

In some lizards and the tuatara, the paired lateral eyes are augmented by another sense organ.

Question	Answer		Article
What is this organ?	The parietal eye.		[[|Link to Article]]
What is the function of this structure?	The parietal eye detects shadows and, thus, perceives the potential threat of predators. It also serves as a dosimeter of light and, as such, helps regulate the diurnal basking activities of reptiles that possess these accessory light-sensitive organs.		[[|Link to Article]]