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Garden Slug Arion distinctus

The other very common species is the Black Field Slug. It too comes in many colours, but it lacks the orange rim near the foot and it has a dark stripe at the side of the body. In the USA The Black Field Slug is called the Garden Arion.

The Black Field Slug has recently been split up into three species: the Black Field Slug (Arion hortensis), the Warty Arion (Arion owenii) and the Garden Slug (Arion distinctus). These species are very similar indeed and can only be told apart for sure by anatomical analysis. It is highly probable though the species below is the Garden Slug.