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Human vision inadequate for research on bird vision
Date:5/12/2008

on can. There are several differences between human and avian perception of colour, which show that certain shades that can be seen clearly by birds are not perceived at all by humans. Through evolution, our colour vision has developed from a more primitive version. This means that we have gone from having two types of colour sensitive cones in our eyes to having three. Birds have four.

Most other animal species only have two, which means that their colour vision is rudimentary. It is human colour vision that differs from the norm, so in reality its ridiculous to use our colour vision to assess the colours of other animals.

The results are not only significant for basic research on sexual selection. They also illustrate the risks of making certain decisions on the basis of human vision, for example, in designing and legislating on lighting systems for domestic fowl.


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Contact: Anders Odeen
Anders.Odeen@ebc.uu.se
46-070-301-5262
Uppsala University
Source:Eurekalert

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