Medium
Photo © 116916927065934112165, some rights reserved
Ocean's Beach, San Diego's ... (Google, OSM) Details Hide details

Description

Snail everywhere on edge of bike path.

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Comments & Identifications

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White Italian Snail - Photo (c) Udo Schmidt, some rights reserved (CC BY-SA)
muir's ID: White Italian Snail (Theba pisana)
Posted by muir over 4 years ago (Flag)
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Hundreds, maybe thousands, of snails seen along bike path, attached high on vegetation. Also seen in other parts of San Diego. According to this U of Florida site, "The white garden snail, Theba pisana (Müller), is the worst potential agricultural pest of the helicid snails introduced to North America....This snail was first noticed in North America in La Jolla, San Diego County, California, in 1914 (Chace 1915, Basinger 1923). It is established only in San Diego County, but has been reported both Los Angeles and Orange counties (Flint 2011). Mead (1971) reported an infestation in Los Angeles County in 1966 which was declared eradicated in 1972 (William A. Edwards, personal communication). The snails were found and identified in August 1985, in San Diego, California, at several localities in about a 10 square mile area. Hanna (1966) stated that T. pisana has been introduced into several eastern localities in the United States. However, there are no published records for North American populations outside of California."

Posted by muir over 4 years ago (Flag)
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Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
pliffgrieff's ID: Milk Snail (Otala lactea)

The main characteristics that separate these two species are size (Theba, smaller; Otala, larger), the lip is much thicker and more pronounced on Otala lactea and, if you look at the aperture, Otala's is glossy and black or dark brown.

Posted by pliffgrieff 9 months ago (Flag)
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Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
loarie's ID: Milk Snail (Otala lactea)
Posted by loarie 9 months ago (Flag)
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Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
muir's ID: Milk Snail (Otala lactea)
Posted by muir 9 months ago (Flag)
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Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
cedric_lee's ID: Milk Snail (Otala lactea)
Posted by cedric_lee 9 days ago (Flag)
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Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
muir's ID: Milk Snail (Otala lactea)
I
Milk Snail - Photo (c) Sam Fraser-Smith, some rights reserved (CC BY)
Community ID: Milk Snail (Otala lactea)
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pliffgrieff loarie cedric_lee 3 people agree
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Observation © Matt Muir
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