"P. argus" use shrubs for roosting, resting, basking, mate location, and shelter and for this reason, they tend to be found in higher numbers close to locations that are dense in shrubs. Most of the population gathers around these shrubs during weather that is colder, cloudy, and windy. When the weather is warm, sunny, and the breeze is still, "P. argus" spends less time in shrub dense habitats and more time in flight and finding host plants in areas rich in calcareous heath. These areas tend to be in exposed hillsides. For this reason, it often appears that the habitat of "P. argus" shifts with weather conditions.