Irish Yellow Slug - Limacus maculatus


    This medium to large (70 to130 mm long) slug is green to dull yellow with darker blotches. It has grey to blue-grey tentacles and colourless to yellow or orange slime. It may have a yellow stripe at the tail end but this doesn't extend more than half way along the body, and is usually much shorter.

    Similar Species

    Limacus flavus, the Yellow Slug, is very similar but is a brighter yellow with smaller spots and blotches. The tentacles are blue, rather than the blue-grey of L maculatus. L. flavus has a yellow line along the keel that extends from the tail to around half the body length or beyond, though it may become broken into dashes.

    Both Yellow Slugs are variable species, but they normally lives in colonies so it is helpful to look at several individuals to see the overall traits, though beware that they can live together.

    Identification difficulty

    Damp places, sometimes under stones and logs. It is closely associated with man-made habitats and is a common garden resident where it can often be found in compost bins

    When to see it

    All year round

    Life History

    This species has been expanding its range across Britain and seemingly replacing Limacus flavus along the way.

    UK Status

    It may be under-recorded due to confusion with Limacus flavus but is expanding its range.

    VC55 Status

    Uncommon or under-recorded in Leicestershire and Rutland.

    Leicestershire & Rutland Map

    MAP KEY:

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

    UK Map