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Nictitating membrane

Nictitating membrane - Picture 4 in Owl Physiology: Vision - This close-up photo shows the nictitating membrane over the eyes of a Young Great Horned Owl (Bubo virginianus).

 

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This close-up photo shows the nictitating membrane over the eyes of a Young Great Horned Owl (Bubo virginianus).

Photographer: Mack Hitch  © Copyright

 
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