What an extraordinary slow-motion video by Japanese photographer Fumihiko Hirai. The video shows a close-up of the nictitating membranes in action. The third eyelid protects the eye, moistening it, and may potentially aid in camouflage. This translucent or opaque membrane is also found in reptiles and certain mammals. Take your time and watch this videoContinueContinue reading “Birds’ Third Eyelid – Inspirational Video”