Predation of Great Pond Snails at Wetwang

摘要

While visiting a dew pond near Wetwang in September 2018 as part of the Yorkshire Wildlife Trust survey of dew ponds on the Yorkshire Wolds, numerous Great Pond Snails Lymnaea stagnalis were found stranded out of water. The pond (SE93696221) at Life Hill Farm had dried ud as a consequence of the hot summer that year, during which there was little rain. We made five visits to the pond between July and November 2018 with specific attention being paid to Great Pond Snails. As there was no clear evidence of any other species of stranded aquatic mollusc, all references below to snails or shells at the Wetwang pond refer to this species.