For an introduction to the lives of wild snails, do take a look at this marvelous book by Elizabeth Tova Bailey:
Note: Lewis Carroll wrote a poem, “A Whiting and a Snail,” from whence comes the title of this post:
‘There is another shore, you know, upon the other side.
The further off from England the nearer is to France –
Then turn not pale, beloved snail, but come and join the dance.’