Fig. 4. Male mating behaviour in the UV-present and the UV-absent areas. (A) Female-searching flights in the open cabbage field. Grey regions of the bars show the number of males continuing to search; white regions show the number of males that stopped searching. (B) Number of mated pairs in closed arenas. (C) Logarithmic plots of the reflection spectra of the ventral side of a female hind wing in the UV-present (solid) and in the UV-absent (dotted) arenas set in the shade.