Bearded Dragons And Their Third Eye

Some people might not know this but Bearded Dragons actually have a third eye on top of their head!
They use this to look for oncoming predators in the sky like hawks. This eye can only determine the difference between light and dark, but this is enough to escape because of the shadow a bird or hawk creates when they swoop down.
                           
                                 The black dot in the middle of the beardie's head is his third eye