🚀 go-pugleaf

In article <8938@medusa.cs.purdue.edu> muttiah@cs.purdue.edu (Ranjan Samuel Muttiah) writes:
>
>Could some knowledgeable biologist on the net tell us which
>animals are color conscious and whether there were evolutionary
>reasons for this ?
>
>Thank You

Well, I'm not trained as a biologist, but I do study vision.  Color
vision appears all over the animal kindom, with varying numbers of
cone types (ie some animals are 'colorblind' but do discriminate some
bcolors).  Also, the spectral sensitivities of different animals
differ (their best 'red' isn't ours; but there are people who have slightly
different photopigments too.) 

Goldfish have color vision.  Some primates have it, some don't.

Reasons: Nocturnal animals tend not to, being entirely rod-based.  The
theory about primate color vision is that red/green discrimination is
real useful if you spend your time looking for ripe fruit against
foliage....but wouldn't you have to examine each species' niche to 
discover how color vision is useful?
--
David A. Honig		
...
Paternalism is a first step towards totalitarian statism.