European snails leave others in the shade!

snailAmong the most solid examples of actual evolution in response to climate change is a shift in the proportion of European larger banded snails (Cepaea nemoralis) with light colored shells.

Shell color is genetic, and the genes responsible are known. It has been shown that, in a given environment, snails with light colored shells have a lower body temperature than those with dark colored shells.

And light colored shells are becoming more prevalent over time in the Netherlands, even in wooded, shady environments where you might expect dark shells to dominate.

National Geographic, 6 May 2014