Rebecca Jolly Rebecca.Jolly at hri.ac.uk
Thu Jun 4 16:55:34 EDT 1998


     I was wondering what drives butterflies and moths to 
     migrate (in this case northwards into southern UK), 
     into areas in which they cannot survive the winter.  Do 
     some of the later/autumn generation migrate south to 
     redress the balance?
     I guess it is an attempt to colonise new areas and 
     exploit new regions where there may be more food 
     available or less disease/predation.
     I would be interested to 'hear' your thoughts.
     Best wishes
     Rebecca Jolly

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