this post was submitted on 24 Jul 2024
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Cool Shades (lemmy.world)
submitted 3 months ago by [email protected] to c/[email protected]
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Photo by Ryan Humphrey

A young Long Eared Owl showing off its third eyelids. These are called nictitating membranes. They add extra protection to the eyes from physical damage and keep them most during flight.

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[–] [email protected] 4 points 3 months ago (1 children)

Third? Wouldn’t they be second?

[–] [email protected] 5 points 3 months ago (1 children)

Nope, they have 3!

They have an upper lid for blinking, a lower one for sleeping, and this one for protection.

Check out my old post and the comments for some more details and to see the possible vestigial human third eyelid!

[–] [email protected] 3 points 3 months ago (1 children)

Sweet! Thank you!

[–] [email protected] 6 points 3 months ago (1 children)

I'm owl-ways here to answer your questions!