Netted Slug - Deroceras reticulatum

Netted Slug vs Chestnut Slug

The Netted Slug, Derocerus reticulatum, is probably the most common and widespread slug in the UK. It can be found in almost all terrestrial habitats so is a species you are likely to encounter frequently. Whilst it is fairly straightforward to identify, it is most likely to be confused with the Chestnut Slug, Derocerus invadens, which is also common, particularly around buildings and in disturbed sites. So how can you be sure which is which?

Firstly check that it is a Derocerus:

• Small-medium size (15-30mm)
• Pale coloured – a shade of off-white/pale grey/pale brown
• No stripes or spots (the Netted Slug may have a few vague brown blotches)
• A keel at the tip of the tail but only running a short way over the body
• A whitish sole and colourless/milky mucus
• Mantle (front section) is roughly half the length of the slug