Wahlbergs Eagle, South Africa
Birds have 3 eyelids, one upper and one lower eyelid, of which the lower is more moveable, and a nictitating membrane. This nictitating membrane is between the other two eyelids and the cornea and has its own lubricating duct equivalent to our tear duct. It is used in cleaning and protecting the eye.
Size: 3579px × 5369px
Photo credit: © Stu Porter / Alamy / Afripics
License: Licensed
Model Released: No
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