Butterfly lovers - site suggestions, France

ValDa
ValDa Forum Participant Posts: 3,004
1000 Comments

A caravanning friend wants to 'do' France for the first time, and is asking for our help and advice.  They both love wildlife and nature, and he's a keen photographer of butterflies.  They want to holiday during May and not to go too far!

Any site suggestions in areas with a varied butterfly population at that time of year?  I thought about somewhere around the Baie de Somme, where there is a nature reserve, and I've found a Butterflies website which makes some suggestions, but does anyone
have real experience of a site in Northern France, which would impress first-timers,  in an area which is good for butterflies.

I also thought about the Lac d'Orient area, where we've seen plenty of butterflies in the past - but I can't remember what time of year!