Helix aspersa, California. This is one of the two main species of snails eaten by the French - "escargots." A species of Eastern Europe, it has been introduced by human commerce to many places in the world. It is a serious pest in the western and southwestern United States, and in Australia (where it is known as the pestiferous "garden snail").
John B. Burch (photographer; copyright holder), Mollusk Division, Museum of Zoology, University of Michigan-Ann Arbor
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