Durham Slug - Arion flagellus
60-100mm. Often greenish but can range from yellow to black. Usually larger than the similar A. subfuscus, it is also distinguished by its colourless mucous (orange in A. subfuscus) and the large tubercles on its back (only 6-9 rows between the dark bands behind the mantle). The crests of the tubercles may also be highlighted yellow. The sole is nearly always paler than the body and generally has a greenish tint. The foot fringe doesn't contrast with the body colour and the lineations don't extend very far across the sole.
Disturbed habitats, wasteground, roadsides and gardens.
Widespread but patchily distributed and probably under-recorded, most records coming from the western half of Britain.
Uncommon in Leicestershire and Rutland.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015