the ash black slug is the largest land slug in the world. The ash black slug is native to Europe. It is recorded in most of Europe, including Bulgaria, Czech Republic, Italy, Netherlands, Slovakia, Great Britain, Ireland, Finland, Ukraine, and several others. It occurs east as far as the Urals. It is common in much of its range, but mostly rare or absent in southernmost Europe. Although known from the Iberian Peninsula and the Balkans, there are no records from Portugal or Greece.