birding-aus

Bird vision

To: Birding-Aus Aus <>
Subject: Bird vision
From: Carl Clifford <>
Date: Tue, 22 Sep 2009 12:48:09 +1000
Dear All,

The vision of birds is quite different to that of humans. Not only do they have 4 types of cone cells in the retina, instead of our 3, avian cone cells contain oil droplets which act as filters. It is near impossible for humans to imagine what bird perceive visually. I think discussing how light effects birds is rather like debating how many Angels can dance on on the head of a pin.

There is an excellent article from Scientific American, entitled "What Birds See" downloadable at http://www.csulb.edu/labs/bcl/elab/avian vision_intro.pdf


Cheers,

Carl Clifford
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