Identification
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Caption
Arion sp., from Michigan. Nearly all slugs seen in urban areas in North America are introduced species, mostly from Europe. Almost invariably they are horticultural pests. Native slugs stay in the forests, where they feed on decaying wood and leaves, and fungal hyphae.
Dr. John B. Burch, Ph.D.
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan
