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Have you ever seen an eagle blink? (Original Post) MLAA Feb 2021 OP
Cool Demovictory9 Feb 2021 #1
Love DU! Always learn something when I visit the page. secondwind Feb 2021 #2
Nice one Myrddin Feb 2021 #3
Wow Skittles Feb 2021 #4
Wonderful video, but Eagles are not unique in this eye movement. Fla Dem Feb 2021 #5
That reminded me of an alligator's blink. BobTheSubgenius Feb 2021 #6
Alligators freak me out. Did you see this massive one? MLAA Feb 2021 #11
Will keep this on file for the next time an eagle challenges me to Politicub Feb 2021 #7
I'll put my money on you politicub 😬 MLAA Feb 2021 #9
The third eyelid Bayard Feb 2021 #8
Cool! MLAA Feb 2021 #10
They nictitate nt Xipe Totec Feb 2021 #12

Fla Dem

(23,239 posts)
5. Wonderful video, but Eagles are not unique in this eye movement.
Sun Feb 28, 2021, 11:44 AM
Feb 2021
Birds rarely blink (with the exception of owls, parrots, ostriches, and a few others) and close their eyes for sleeping by raising the lower lids. Usually unseen, however, is the third eyelid (nictitating membrane), located beneath the upper and lower lids, which moves horizontally across the eyeball. The movement of this eyelid across the eye functions like our blinking and serves to keep the eye moist. In some diving birds, the nictitating membrane has a transparent window that permits vision underwater while the membrane is closed.

https://www.birdwatchingdaily.com/news/science/why-birds-eyes-are-so-large-and-how-they-function/#:~:text=Do%20birds%20blink%3F,moves%20horizontally%20across%20the%20eyeball.

BobTheSubgenius

(11,530 posts)
6. That reminded me of an alligator's blink.
Sun Feb 28, 2021, 01:15 PM
Feb 2021

The membrane did, anyway. Thank you, MLAA! That was unexpected and cool!

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