Yellow Slug - Limacus flavus

    Alternative names
    Limax flavus

    Length extended: 8 or 9 cm. The body is usually a lemon yellow colour with darker markings. The tentacles are often blue. It has a central yellow line along the keel which extends from the tail to around half the body length, though may be broken into dashes.

    Similar Species

    Limacus maculatus, the Irish Yellow Slug, is very similar and may be replacing L. flavus in some areas. Its yellow background colour is often a duller shade and is overlaid with larger spots and blotches – making it appear darker and greener overall. Its tentacles are more blue-grey. It may have a short keel stripe at the tail end but this stops well before the halfway point of the body.

    Identification difficulty

    Often associated with man, it can be found in gardens and even cellars.

    When to see it

    All year round.

    Life History

    Feeds mostly on fungi, decaying matter and vegetables.

    UK Status

    Occasional in England and Wales.

    VC55 Status

    Rare/uncommon in Leicestershire and Rutland and declining as it is replaced by Limacus maculatus. It is believed that L. flavus and L. maculatus hybridise which is contributing to the loss of the former species.

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    Leicestershire & Rutland Map

    MAP KEY:

    Yellow squares = NBN records (all known data)
    Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

    UK Map