This is a common brimstone (Gonepteryx rhamni) depositing eggs. We spotted her last saturday in the forest:
Olympus Stylus 1s, 300mm, ISO200, f5.6, 1/100s
How we know she was depositing eggs, you may wonder? Well, we checked:
Olympus Stylus 1s, 42mm, ISO200, f5.6, 1/50s
The male of the species is a much intenser yellow, maybe because he doesn't need to be camouflaged so much:
Olympus XZ-1, 112mm, ISO100, f8, 1/100s
Thanks for watching!