29K views · 3.4K reactions | Did you catch the third eyelid?  The...

Slow motion clip of a Forest whiptail lizard blinking its eye, showing nictitating membrane crossing

1.7K views · 48 reactions | The Nictitating Membrane is a thin, translucent layer located beneath the regular eyelids of many bird species. This membrane serves functions like eye protection and moisture retention. Watch it here. | Animals Videos | Facebook

Gator Chris feeding Seven the Alligator and showing us his nictitating membrane - a whitish or translucent membrane that forms an inner eyelid in birds, reptiles, and some mammals. It can be drawn across the eye to protect it from dust and keep it moist 😃🐊 📹 VIA Gator Chris & {IG} @george_da_nature_dude_ #nictitatingmembrane #seventhealligator #evergladesholidaypark #everglades #gatorboys #chrisgillette #gatorboysalligatorrescue #alligator #alligatorsofinstagram #reptile #reptilesofinstagram

How many eyelids do chickens have? Three! The third eyelid, called the nictitating membrane, closes horizontally across the eye, as opposed to the others which close vertically like ours! This third eyelid helps keep the eyes clean, moist and protected from dirt - especially when dust bathing! You might catch it on photos - fully closed or halfway across! Making the eye look opaque! But it’s not opaque, it’s actually transparent! This allows chickens to see through this eyelid, even when it is c