Early one morning recently I was making my way on foot through Amboise and encountered a magnificent Leopard Slug Limax maximus (Fr. Limace léopard) on the footpath near the town hall. My guess is that it lives in the museum courtyard in a nice little damp crevice, and was on its way back from a night of gallivanting along the banks of the Loire (or working over the cafés along the Quai de Général de Gaulle).
Leopard Slugs are very large, up to 20 cm in length. This one wasn't that big, but it was more than 10 cm, and at 13 cm exactly average for Leopard Slugs. Their scientific name means 'largest slug', but in fact one of their cousins, the Ash Black Slug L. cinereoniger, is bigger. We get them here too, but they stick to the forests and are not seen in urban environments.
This one is a very typical pattern and colour, but they do vary quite a bit in terms of how stripey or spotty they are and how brown or grey they are. The thicker rounded front is called a shield, and hidden underneath it is a shell. These slugs take a couple of years to reach maturity, but then don't live more than a year after that.
Their natural range is Central Europe and North Africa, but they have been introduced to many other places, including Australia. Solitary in their habits, they live in damp environments, near water courses, in forests, parks and gardens.
Primarily they eat rotting, wilted and dead plants, moss, fungi and dead wood, but they have occasionally been clocked at speeds of 15 cm per minute as they hunt other slugs.