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Geomalacus maculosus, commonly known as the Kerry Slug or Kerry spotted slug, is a species of large air-breathing land slug, a terrestrial pulmonate gastropod mollusc in the family Arionidae, the roundback slugs. An adult slug generally measures about 7–8 cm (2.8–3.2 in) in length, and is a dark greyish colour with yellowish spots.

The distribution of this species includes wild habitats in southwestern Ireland, in north-west Spain and from central to northern Portugal. It favours acidic soil and high humidity environments, and is mostly nocturnal or crepuscular, although is active on overcast days in Ireland. It eats lichens, liverworts, mosses and fungi growing on boulders and on trees. (Read more...)