Nictating Membrane Photos

Tiger shark with closed nictating membrane.
Species: Tiger shark, Galeocerdo cuvier
Location: Bahamas
Image ID: 31910  

Tiger shark close up view, including nictating membrane covering the eye, nostrils and ampullae of Lorenzini.
Species: Tiger shark, Galeocerdo cuvier
Location: Bahamas
Image ID: 31925  

Brown pelican nictitating membrane, a translucent membrane that forms an inner eyelid in birds, reptiles, and some mammals. It can be drawn across the eye to protect it while diving in the ocean, from sand and dust and keep it moist.
Species: Brown Pelican, Pelecanus occidentalis, Pelecanus occidentalis californicus
Location: La Jolla, California
Image ID: 38873  

Juvenile bald eagle, translucent nictating membrane drawn completely across eye, second year coloration plumage, closeup of head, snowflakes visible on feathers. Immature coloration showing white speckling on feathers.
Species: Bald eagle, Haliaeetus leucocephalus, Haliaeetus leucocephalus washingtoniensis
Location: Kachemak Bay, Homer, Alaska
Image ID: 22693