You can just see a little caterpillar under the web at lower right.Since then I've found another web. As I've discovered, they can withstand very cold weather, but the dry spring seems to have affected them greatly. I think the drought caused a loss of their secondary food plant, speedwell, just when they needed it in the spring this year. Hopefully next year will go better for them.
PS I saw the first orchid leaf rosette for the season, at le Petit Pressigny, on the side of the road, when I was there for L'Art et Lard.