For butterflies to survive the winter they have to hibernate, or at least seek protection. A few, like Red Admirals and Peacocks, hibernate as adults, clinging to walls inside barns and garden sheds and hoping not to freeze. Some hibernate as eggs, hidden deep within the larval food plant, and others as pupae, ready to hatch at the first hint of nice weather in the new year.
Origanum vulgare (or l'origan in French) in August.
(rather a lot of caterpillar poo!)
Adult males often sit with open wings on these dirt tracks, or on the tips of grass seed heads. They are assertive, agile and rapid flyers, and quite agressive to one another.