while flying I thought the wings had orange parts but with wings closed I can't distinguish between a brimstone or a cleopatra
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If there was orange on the upper wing then it was probably a Cleopatra but I am not familiar with the butterflies of Spain, there may be another species. Perhaps a butterfly expert can help more.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 36.156, -5.472