Thanks for your helpful advice. I'll go away and swot up on my butterfly anatomy now...

A few more photos are here on my blog:
http://bogbumper.blogspot.com/2006/07/b ... -blue.html

Katie

I don't mind being wrong but I want to know why!

Does anyone have any tips for identifying Common Blue v Brown Argus? I'm struggling a bit! I think this might be a female Common Blue: http://upload4.postimage.org/684528/blue5604.jpg and this might be a Brown Argus: http://photos1.blogger.com/blogger/586/384/400/commonblue5587.jpg but it wouldn't s...