4f4c4942-4343-5764-6473-313234373334 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-01-09T10:09:54.188Z NRW 1.0 wel NONE Surveys for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI, Geyer’s Whorl Snail Vertigo geyeri on Cors Geirch SSSI & Cors Erddreiniog SSSI, 2019 Surveys for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI, Geyer’s Whorl Snail Vertigo geyeri on Cors Geirch SSSI & Cors Erddreiniog SSSI, 2019 2020-02-01 NRW_DS124734 Geyer’s Whorl Snail Vertigo geyeri has been recorded from three sites in Wales. However, surveys of Cors Erddreiniog SSSI in 2016 and of Cors Geirch SSSI in 2016 and 2017 failed to locate the snail. It was feared that V. geyeri had been lost from both sites but, as small populations of this tiny snail can easily be overlooked, it was felt premature to declare the snail as extinct and additional surveys were therefore undertaken at both sites in October 2019. The survey focussed upon two areas of potentially suitable habitat that had been recently surveyed; (1) an area of horse-grazed ‘Carex-lawn’ within the National Nature Reserve where V. geyeri had been reported in 1998 and (2) a series of base-rich flushes lying towards the western end of the National Nature Reserve last surveyed in 2016. Geyer’s Whorl Snail Vertigo geyeri has been recorded from three sites in Wales. However, surveys of Cors Erddreiniog SSSI in 2016 and of Cors Geirch SSSI in 2016 and 2017 failed to locate the snail. It was feared that V. geyeri had been lost from both sites but, as small populations of this tiny snail can easily be overlooked, it was felt premature to declare the snail as extinct and additional surveys were therefore undertaken at both sites in October 2019. The survey focussed upon two areas of potentially suitable habitat that had been recently surveyed; (1) an area of horse-grazed ‘Carex-lawn’ within the National Nature Reserve where V. geyeri had been reported in 1998 and (2) a series of base-rich flushes lying towards the western end of the National Nature Reserve last surveyed in 2016. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Desmoulin's whorl snail geyer's whorl snail Cors Geirch vertigo geyeri Cors Erddreiniog vertigo moulinsiana vertigo moulinsiana whorl snails NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -4.517494 -4.317974 52.902143 53.281314 2019-10-14 2019-10-16 Willing, M. J. 2020. Surveys for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI and for Geyer’s Whorl Snail Vertigo geyeri on Cors Geirch SSSI & Cors Erddreiniog SSSI in 2019. NRW Evidence Report No. 404. Surveys for Geyer’s Whorl Snail Vertigo geyeri on Cors Erddreiniog SSSI & Cors Geirch SSSI and for Desmoulin’s Whorl Snail Vertigo moulinsiana on Cors Geirch SSSI in 2019 Database [A] Database: records held in WID [B] Documents: pdf of the report in the DMS report archive. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Surveys for Vertigo geyeri were undertaken on Cors Erddreiniog on 14th and 16th October 2019 and on Cors Geirch on 15th October 2019. Sampling relied primarily upon the well-established technique of selecting potentially suitable habitat and then removing sample material for later laboratory processing as this tiny snail is typically very difficult to locate in the field. Surveys for Vertigo geyeri were undertaken on Cors Erddreiniog on 14th and 16th October 2019 and on Cors Geirch on 15th October 2019. Sampling relied primarily upon the well-established technique of selecting potentially suitable habitat and then removing sample material for later laboratory processing as this tiny snail is typically very difficult to locate in the field.