The eye of the pied kingfisher is protected during high speed water entry via a bony plate.

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"The pied kingfisher (Ceryle rudis), a highly adapted bird who feeds almost exclusively on fish, some crustaceans and aquatic insects, also has a bony plate joined to the prefrontal bone of the skull, which provides a sliding screen in front of the eye for when it plunges into the water." (Fowler and Miller 2003:254)

Zoo and Wild Animal Medicine

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