Strange Pupils
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The tree frog has a large light-collecting pupil for night vision, like many snakes and reptiles. |
The flounder has a beautiful filigree-like pupillary flap, perhaps to help camouflage it as it hides in the sand. |
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The tokay gecko has a stenopeic pupil that shuts down to two tiny circles in bright daylight. |
The octopus has an unusual square-shaped pupil. |
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The australian female net-casting spider has a very large lens to enhance night vision. |
The whip snake's pupil is irregularly shaped. Nocturnal snakes have slit pupils and infrared sensing pits around their jaws so that they can see in the dark. |
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