DID YOU KNOW?
When the red-eyed tree frog sleeps during the day, a gold membrane creeps over its eyes. It lets in a small amount of light, enough so that if a predator approaches, the non-poisonous frog can wake up!
Source: https://www.newscientist.com/article/1996199-smaug-the-dragon-or-frog-with-an-eye-to-die-for/