In article <Pine.HPP.3.91.961020034223.28734A-100000 at csws12.ic.sunysb.edu>, Grace K Hsu <ghsu at ic.sunysb.edu> says:
>>> Probably because mammals (so far as I know) can't grow green
>pigments? Why they can't? I'm not sure ( I mean aren't bird's feathers
>made of the same matirial as fur?)
>
i believe that the green color of a (for instance) parrot's feathers is
caused by light refraction, not by green pigmentation. anyone know if
that is true for all green birds?
what is the pigment involved with green grasshoppers? or those lime green
poisonous frogs?
-julie
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