Greenhouse Slug - Ambigolimax valentianus

55-80mm extended. This pale brown, medium-sized slug has 2-3 dark lines on the mantle which extend as tramlines along the body. These lines generally lighten with age. Mature specimens have a translucent, watery appearance. It has a small keel at the tip of the body. The sole is pale and the mucus colourless.

The Balkan Threeband Slug Ambigolimax nyctelius is usually more clearly marked but confidently separating these two species requires dissection. 

Often found near greenhouses, plant nurseries, allotments, under dead wood and in compost bins.

Peak time is summer.

This slug appeared in Britain from Spain and seems to be increasing.

Widespread in England, fewer records from elsewhere in Britain.

Status in Leicestershire and Rutland not known.