Twenty four hours iguana

Twenty four hours iguana

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This image is part of the feature The Eye Nature Cameras

Credit: DR MORLEY READ/SCIENCE PHOTO LIBRARY

Caption: Twenty four hours, Polychrus marmoratus, so called because it is believed that you will die in 24 hours if one jumps on you. This picture is a close up of its eye surrouded by a "dead" horny epidermis which is convoluted to form scales. The eyes are located either side of the head so that they command a large field of view but are capable of binocular vision only over a small field. Because binocular vision is necessary for precise estimation of distance; the eyes have become so mobile that they can fixate on prey simultaneously, as in the chameleons. The distance of the prey can therefore be estimated "stereoscopically".

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Keywords: animal, eye, iguana, iguanid, lizard, nature, polychrus, polychrus marmoratus, reptile, reptilia, twenty four hours, type, wildlife, zoology

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