Distribution of Mimicry
Here's a question that has probably been answered in some dusty Master's thesis sitting at a university library...
Do Bay Laurel and yellow forms of Ariolimax overlap? Or, better yet, are there yellow forms of Ariolimax outside the range of the Bay Laurel?
Flickr Banana Slug photoset http://www.flickr.com/photos/kibak/sets/72057594120636206/
