This was taken on May 6 at about 10 a.m. at the entrance to the Hainberg. Actually, I saw a lot of oak trees but no processionary caterpillars, nor the people out fighting them. In the past couple of days, helicopters have apparently been spraying.
A copse with an infestation of Nordic walkers:
I’m not sure why the Nordic walkers are congregating here, but they may be attracted by the shade.