A hawk’s has nictitating membranes, allowing it to clean its eyes. The membranes act like skydiving goggles when the hawk dives to pursue prey.
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πŸ‘€︎ u/Peachy-Persimmons
πŸ“…︎ Oct 28 2021
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Great Blue Heron with a fresh catch and a retracting nictitating membrane
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πŸ‘€︎ u/maggracers
πŸ“…︎ Nov 13 2021
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A Bald Eagle at the Alaska Raptor Center, showing off her β€œnictitating membrane”. Birds have upper and lower outer eyelids, but beneath the outer eyelids lies an extra eyelid, called the nictitating membrane.
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πŸ‘€︎ u/b12ftw
πŸ“…︎ Nov 19 2021
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Cat's nictitating membrane (third eyelid) retracting v.redd.it/lxywghjrxl581
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πŸ“…︎ Dec 15 2021
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πŸ”₯ Managed to capture the moment this meerkat uses its nictitating membrane to clean its eyes. Kind of makes the little fella looked cross eyed.
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πŸ“…︎ Dec 02 2021
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πŸ”₯ Martial eagle's nictitating membrane! reddit.com/gallery/qmme7k
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πŸ‘€︎ u/Vesko567
πŸ“…︎ Nov 04 2021
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Nictitating membrane! Beardies have a third eyelid, incidentally not at all related to the third eye either.
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πŸ‘€︎ u/FACEonYourFACE
πŸ“…︎ Dec 10 2021
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Great Blue Heron with a fresh catch and a retracting nictitating membrane
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πŸ‘€︎ u/maggracers
πŸ“…︎ Nov 13 2021
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Bald eagle showing it's nictitating membrane. [D500 w/ Sigma 150-600 C f6.3 1/1000 600mm ISO1000]
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πŸ‘€︎ u/mean-street
πŸ“…︎ Oct 22 2021
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Great Blue Heron with a fresh catch and a retracting nictitating membrane
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πŸ‘€︎ u/maggracers
πŸ“…︎ Nov 13 2021
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Martial Eagle flashing its nictitating membrane while feeding on a kill
πŸ‘︎ 2k
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πŸ‘€︎ u/Pardusco
πŸ“…︎ Aug 10 2021
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A ravens nictitating membrane (third eyelid)
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πŸ‘€︎ u/Brucy_J
πŸ“…︎ Nov 07 2021
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A female Great Horned Owl shows off her nictitating membrane, a third eyelid, which moves horizontally across the eye. This membrane is actually a thin translucent fold of skin that helps birds keep their eyes moist, protected, and clean. Video courtesy of Cornell Lab Bird Cams. gfycat.com/calculatingloa…
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πŸ‘€︎ u/b12ftw
πŸ“…︎ Sep 01 2021
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Great Blue Heron with a fresh catch and a retracting nictitating membrane
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πŸ‘€︎ u/maggracers
πŸ“…︎ Nov 13 2021
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Montague's Harrier, Male. Nictitating membrane in action.
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πŸ“…︎ Oct 29 2021
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Great Blue Heron with a fresh catch and a retracting nictitating membrane
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πŸ‘€︎ u/maggracers
πŸ“…︎ Nov 13 2021
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Closeup of an American Raven I took yesterday. Love taking a shot of a birds nictitating membrane, always gives some spooky energy to any photo. QC-Canada reddit.com/gallery/o8ysdz
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πŸ‘€︎ u/karim_bouzidi
πŸ“…︎ Jun 27 2021
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πŸ”₯ Shark revealing its nictitating membrane πŸ”₯
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πŸ‘€︎ u/Peachy-Persimmons
πŸ“…︎ Jun 10 2021
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Superbowl showing off its nictitating membranes. SW Idaho.
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πŸ‘€︎ u/musicphoto
πŸ“…︎ May 28 2021
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Got my first nictitating membrane capture today!
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πŸ‘€︎ u/riskykreme
πŸ“…︎ Sep 12 2021
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Closeup of an American Raven I took yesterday. Love taking a shot of a birds nictitating membrane, always gives some spooky energy to any photo. QC-Canada reddit.com/gallery/o8ysz4
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πŸ‘€︎ u/karim_bouzidi
πŸ“…︎ Jun 27 2021
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look at that nictitating membrane action. this grackle is using its translucent third eyelid to take a bath without getting water and debris in its eyes.
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πŸ‘€︎ u/pigeon_unknown
πŸ“…︎ Jun 03 2021
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The Nictitating Membranes
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πŸ“…︎ Oct 07 2021
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ITAP of a red tailed hawk blinking it’s nictitating membrane (third eyelid)
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πŸ‘€︎ u/ahicken0
πŸ“…︎ Oct 13 2021
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White Ibis mid blink with it's nictitating membrane showing.
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πŸ‘€︎ u/Life-in-lens
πŸ“…︎ Aug 18 2021
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Closeup of an American Raven I took yesterday. Love taking a shot of a birds nictitating membrane, always gives some spooky energy to any photo. QC-Canada reddit.com/gallery/o8yspa
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πŸ‘€︎ u/karim_bouzidi
πŸ“…︎ Jun 27 2021
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Accidentally caught a photo of Maizey blinking her inner eyelid (nictitating membrane) imgur.com/S8ylnNL
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πŸ“…︎ Feb 19 2021
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Could dinosaurs have had a nictitating membrane like birds?
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πŸ“…︎ Jun 10 2021
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White Ibis mid blink with half the nictitating membrane closed.
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πŸ‘€︎ u/Life-in-lens
πŸ“…︎ Aug 18 2021
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ITAP of a Gray Crowned Crane's nictitating membrane
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πŸ‘€︎ u/Bergietron10K
πŸ“…︎ Jul 20 2021
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πŸ”₯ A raven blinks, briefly revealing its icy blue nictitating membrane (OC)
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πŸ‘€︎ u/PolarBearCookies
πŸ“…︎ Apr 12 2021
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White Ibis with half it's nictitating membrane showing.
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πŸ‘€︎ u/Life-in-lens
πŸ“…︎ Aug 18 2021
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American dipper also known as a water ouzel is a fascinating dark gray bird found in fast-flowing, boulder-strewn streams in Costa Rica’s mountains and foothills, equipped with an extra eyelid called a β€œnictitating membrane” which enables him to see underwater and scales its nostrils when submerged.
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πŸ‘€︎ u/Least-Song2812
πŸ“…︎ Jun 24 2021
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Juvenile European Starling flashing the handy Nictitating Membrane, or β€œthird eyelid”
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πŸ‘€︎ u/rjmcaptures
πŸ“…︎ May 28 2021
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Nictitating eye membrane of a Raven in the rain.
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πŸ‘€︎ u/sonomabud42069
πŸ“…︎ Jan 25 2021
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When I first looked back on these, I was *frightened*. But nope, just the nictitating membrane. reddit.com/gallery/mgviu3
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πŸ‘€︎ u/pleasehelpme501
πŸ“…︎ Mar 31 2021
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The nictitating membrane is a transparent or translucent third eyelid present in some animals. It generally functions to protect the eyes or to clear debris.
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πŸ‘€︎ u/remotectrl
πŸ“…︎ Apr 28 2018
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Red-tailed Hawk flashing its nictitating membrane while eating a gray squirrel
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πŸ‘€︎ u/Pardusco
πŸ“…︎ Feb 24 2021
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Parrots (and other birds) have a nictitating membrane below their eyelid, allowing them not to loose sight when they blink.
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πŸ‘€︎ u/Ulrizza
πŸ“…︎ Aug 28 2020
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Barn Swallow mid-blink showing off the nictitating membrane
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πŸ‘€︎ u/OhHelloPlease
πŸ“…︎ Jun 25 2021
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look at that nictitating membrane action. this grackle is using its translucent third eyelid to take a bath without getting water and debris in its eyes.
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πŸ‘€︎ u/Kunphen
πŸ“…︎ Jun 03 2021
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my cat has (recently?) developed a small lesion on nictitating membrane

Species: cat

Age:16

Sex/Neuter status:

Breed:

Body weight: 10lbs

History:

Clinical signs:

Duration: within the past couple days?

Your general location: Illinois

Links to test results, X-rays, vet reports etc: none

My 16yo neutered male cat has (very recently...today?) developed a small reddish lesion on the margin of his right nictitating membrane. Today was the first day I noticed this (please see attached pic). I have also attached two other pics from last week and the lesion does not appear to me to be present there. He's in my face every day, so I think I would have noticed it if had been present for longer. It jumped right out at me today. He does not appear to be in any discomfort.

https://imgur.com/a/8bamQIt

His medical history is unremarkable except for a quick bout of FUS 3 years ago and he has been fine since then. He is a very healthy, spry little fellow.

We have two other cats in the house as well, and all three are strictly indoor cats.

I hope this is just a little scratch or something like that. He is so precious to me.

Thank you for any thoughts on this.

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πŸ‘€︎ u/cheeseOMG
πŸ“…︎ Apr 27 2021
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That third eyelid dogs and some other animals have. It’s called the nictitating membrane, and it washes their eyes to prevent disease.
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πŸ‘€︎ u/Layjo92
πŸ“…︎ Dec 01 2020
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Why don't humans have functional nictitating membranes?

I think humans have been swimming and diving for a long time for fishing and sports, so shouldn't there still be some humans these days who have functional nictitating membranes?

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πŸ“…︎ Mar 12 2021
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Just look at that nictitating membrane!
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πŸ“…︎ Apr 01 2021
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My sleeping puppy’s third eyelid (or nictitating membrane)
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πŸ‘€︎ u/CrystalKU
πŸ“…︎ Mar 06 2021
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