Chestnut Slug - Deroceras invadens

Alt Name
Deroceras panormitanum

Usually pale blotchy brown, but can be darker. It can be distinguished from the commoner D. reticulatus by its finer, smoother tubercles and the dark sole. It also has a pale ring around the breathing pore, though this can be faint in some specimens. A useful ID tip is that it is a (relatively!) fast mover and is usually the first slug to slide away when disturbed.

Similar Species

Deroceras reticulatum is larger, has larger tubercles and a net-like pattern in the grooves. It has a pale sole.

Deroceras laeve is small (similar in size to D. invadens) and has a brown sole, concolorous with the body.

Photo ID?

Found to be particularly common in Nurseries, but also found in parks and gardens.

When to see it

All year round.

Life History

Introduced to Britain in the early 1930s. It can lay around 30 eggs a week these take 2 weeks to hatch and reach sexual maturity in around eight weeks.

UK Status

Common over most of Britain and increasing.

VC55 Status

Common in Leicestershire and Rutland.

Leicestershire & Rutland Map

UK Map