Mimicry, Monarch?

[S. Silverman]

A few years ago I remember reading an article (Nature?) on mimicry in 
the Viceroy butterfly, I believe.  The gist was that one did not need to
invoke mimicry of the Monarch, as the Viceroy was distateful to some 
birds.  Anyone remember the reference?

Thanks
--------Sandy
-- 
Sanford Silverman               >Opinions expressed here are my own< 
American Cyanamid  
silvermans at pt.cyanamid.com                      "Yeast is Best"