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Kingfisher - The Third eyelid | by Ann and Chris
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Kingfisher - The Third eyelid

The third eyelid...

 

The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid

 

It's clever., because as well as offering extra protection it allows some maintenance of vision for the bird

 

It also produces some very unusual photographic effects!

 

 

 

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Taken on September 24, 2020