These snails were introduced to the cities of the Sonoran Desert from the Mediterranean region to control the Brown Garden Snails which were themselves introduced as a possible source for escargot. Does this remind you of the "Lady Who Swallowed a Fly"? These snails will also prey on slugs. They are common to abundant in gardens and damp lawns where they also eat dead leaves and occasionally young seedlings so their presence in huge numbers is not entirely benign.

During extended rain events these snails may emerge en masse from their usual hiding places seeking a drier location. Dilute rainwater, by osmosis, can drown these xerically adapted mollusks.