www.ukbutterflies.co.uk

includes " Magical Moth Migration: Amazingly, tiny Silver Y moths are the UK's biggest migrant species. They leave our shores in their hundreds of millions each September, heading south to the Mediterranean to escape the freezing winter. How these tiny insects achieve this momentous journey has, until recently, been an unsolved mystery, but new advances in radar technology have enabled scientists to unravel the story. Martin Hughes-Games heads to Rothamsted Research to find out more."
http://www.bbc.co.uk/mediacentre/latest ... -2013.html

Thanks. Have it on. it's usually the same old stuff but there is the odd interesting bit.