www.ukbutterflies.co.uk

I am going on a family visit in late April flying to Barcelona and then traveling by car to Zaragoza. Does anyone know of good places to see butterflies anywhere in those areas?
Ian

Catalan Butterfly Monitoring Scheme http://www.catalanbms.org/ca/xarxa/

(in Catalan - annoyingly if translation software is used the site names get translated as well!)

And any web or other resource with info of the butterfly status in the rest of Spain? I have the European guide, but I would appeciate any more detailed info about the best places and dates. Thank you!