Some recent days have been very buggy. I guess all the moisture allows insects to live and reproduce, and as soon as there's a ray of sunshine, they get hyperactive. At this time of year, when the sun does shine, it feels hot. It rained for only about an hour yesterday, early in the evening.
Butterflies are the prettiest insects, and the most inoffensive. You don't need to wear bug spray even if you see a lot of them flitting around in the vineyard. I just read that there are about five thousand species of lépidoptères in France.