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Many thanks Janet for the swift and good feedback, that photo link was really helpful. I only have a few definitive shots, but all my Wiltshire males are P. germanica so far. Tim Worfolk finds germanica the most common by far in Devon, followed by communis, but he hasn't seen cognata yet. Interesting to hear that you have all 3 in Lincs and that the ratios differ near Chris in Reading. At least we only have 3 to work out, unlike Juergen in Germany. They're great looking insects to photograph, tho a bit frustrating as they prefer the shadows, often lurking deep in bushes, and keep hopping off just as you hit focus on them.. One hung around the same part of the same bush for days and I finally got some decent shots of him!