Author 'Francis-Sisco' (Id 247677 ) : The Sailboat chess board is a large black butterfly stained very pale yellow (almost white), which presents an eye-spot anal red.
This butterfly flies by all the time, even when the sky is overcast.
It is a migratory species that is currently extending its area of distribution. Lien : Https://fr.wikipedia.org/wiki/Papilio_demoleus