The following questions are the focus of interest:
- Is the pigmentation of these snails stronger associated with climatic or vegetation ecological parameters? Does thermal selection or selection by predation dominate on a continental scale?
- Is it possible to draw up a map of pigmentation intensity over the entire distribution range?
- Based on predicted climate change in Europe, how will the range of this species and the distribution of pigmentation patterns change? Will extinction processes occur? Is the selection pressure due to environmental warming having different effects in the different climates of Europe?