Say what? Nick-who?\n\nMany birds have an extra eyelid as seen here:\n[URL]http://www.pbase.com/bret/image/87308265/original[/URL]\n\nThe nictitating membrane acts as a third eyelid, moving horizontally\nacross the eye starting at the inner corner. A bird can close the\nclear membrane to protect the eye without losing vision. The membrane\nspreads fluid across the eye, keeping the eye moist. Birds most likely\nuse the membrane when flying on windy days or when dust and debris are\nin the air.\n\nGotta love The Google!