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|  » Stats |
Members: 50,157
Threads: 82,349
Posts: 853,287
Top Poster: glsammy (15,069)
| | Welcome to our newest member, Ye Olde Justin | |  | 
08-06-2011, 12:46 PM
| | Active Member | | Join Date: Mar 2010
Posts: 62
| | | Invasive Sandhill snails?
Can anyone confirm my tentative ID of these small, flattened banded snails as an invasive species form the Mediterranean Theba pisana (Sandhill / Mediterranean coastal snail) which I phootgrpahed in Cornwall recently. The species is apparently establishing colonies along many SW coasts.
15.4.11 c1cm feeding on ?Dock? leaves on coastal cliff, Polzeath, Cornwall.   |
09-06-2011, 07:36 PM
| | Commander of the Wild Empire | | Join Date: Jan 2008 Location: S. Devon
Posts: 3,897
| | | Re: Invasive Sandhill snails?
I can't offer an identification, or even suggest where to try. But thanks for showing these, I will keep a look out on the S. Devon coast. |
09-06-2011, 11:33 PM
| | Commander of the Wild Empire | | Join Date: Feb 2010
Posts: 1,193
| | | Re: Invasive Sandhill snails?
Quote:
Originally Posted by NickU  feeding on ?Dock? leaves on coastal cliff, Polzeath | Horseradish. |
10-06-2011, 07:28 AM
|  | Commander of the Wild Empire | | Join Date: Dec 2006 Location: On the southern boundary of the Lake District National Park.
Posts: 4,584
| | | Re: Invasive Sandhill snails?
They do indeed look like Sandhill Snails. Your image shoes the peripheral keel on a young specimen well. This sharp keel is lost as the snail matures.
I've seen this species in a garden on the outskirts of Gloucester and ID was corroborated by GWT.
Nice images. |
10-06-2011, 08:39 AM
| | Active Member | | Join Date: Mar 2010
Posts: 62
| | | Re: Invasive Sandhill snails?
Many thanks Geoff, Matt (thanks for the botany input, thought the leaves were a bit thick and curly for dock..) and the Woodman. Good to get a confirmation. I was pretty sure as I'd checked a number of snail websites and everything looked right for Sandhill snails. Apparently UK colonies are often found close to coastal car parks, though I'm not sure if this is linked to how they get dispersed, to snail watchers not walking very far... or to them liking dry gravelly habitats withy weedy fringes! These were by a cliff path with car parks 200 m either side of them..
This mediterranean snail (which did seem vaguely familiar, and now I remember I have seen masses of them clustered on vegetation in Greece) can apparently outcompete indigenous species in the UK and can become an agricultural pest Theba pisana - Wikipedia, the free encyclopedia. Horseradish growers beware!
Nick Upton - naturalist / photographer | | |
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