|[Note Guidelines] Photographer's Note|
|A Frog hunts on land by vision. He escapes enemies mainly by seeing them. His eyes do not move, as do ours, to follow prey, attend suspicious event, or search for things of interest. If his body changes its position with respect to gravity or the whole visual world is rotated about him, then he shows compensatory eye movements. These movements enter his hunting and evading habits only, e.g. as he sits on a rocking lily pad. Thus, his eyes are actively stabilized. He has no fovea, or region of greatest acuity in vision, upon which he must center a part of the image.... |
The frog does not seem to see or, at any rate, is not concerned with the detail of stationary parts of the world around him. He will starve to death surrounded by food if it is not moving. His choice of food is determined only by size and movement. He will leap to capture any object the size of an insect or worm, providing it moves like one. He can be fooled easily not only by a piece of dangled meat but by any moving small object. His sex life is conducted by sound and touch. His choice of paths in escaping enemies does not seem to be governed by anything more devious than leaping to where it is darker. Since he is equally at home in water and on land, why should it matter where he lights after jumping or what particular direction he takes? He does remember a moving thing provided it stays within his field of vision and he is not distracted.
I took this photo lying down on the ground to achieve eye level contact with the toad, hence I was not able to use a tripod.
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