Excellent... when I first started looking for European butterflies, I would have found these invaluable.... I find many features explained in guides are less than easy to distinguish therein.....yet such are easier in side by side images..... such as Guy's Rock vs Woodland Grayling last year, and all Roger Gibbons Skipper work.
? should build into a specific forum on overseas tricky ID issues?? ( for those who are interested, and fortunate enough to get out there)
I would like to see a series of Mellicta undersides for example, tried a bit ago, with limited success.
PS.... just really enjoyed looking through your photos Nik, on your website.