I'm always amazed about the differences in our human perception and how that very same flower would look like if seen through insects eyes (butterflies in that case).
[click on image to see a STEREO image in large]
Human Vision:
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Butterfly Vision (simulated, UV mapped as blue)
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Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos