I have just this one not much sharp photo of this a little bit strange butterfly.
It should not be rare, but I took just one photo per whole week walking meadows and river banks.
It has very cut out wings and the horizontal C mark on the wings. It is clearly visible.
https://en.wikipedia.org/wiki/Polygonia_c-album
South Bohemia, Trebon region, Czech republic
Pentax K50 f 7,1; 1/320 sec; ISO 200; lens zoom 4,5-6,3/55-300 mm