Steve Downer / Black slug (Arion ater agg.) feeding on a dead Yellow slug (Limax flavus), Birmingham, England, UK, August.

Steve Downer / Yellow slug (Limax flavus) back lit embryo moving around in egg case.

Steve Downer / Yellow slug (Limax maximus) moving across bridge over road with traffic in the background. Birmingham, UK. June.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Steve Downer / Yellow slug larva (Limax flavus) emerging from an egg case, controlled conditions.

Konrad Wothe / Leopard slug (Limax maximus) Bavaria, Germany, July.

Fabrice Cahez / Slug (Limax maximus) on Common evening-primrose (Oenothera biennis) flower, Vosges, France, July.

Ingo Arndt / Wildlife Photographer Ingo Arndt on location, taking pictures on leopard slug (Limax maximus) during the night and checking pictures on the camera display, Swizerland

Ingo Arndt / Carpathian blue slug (Bielzia coerulans) Slovakia

Ingo Arndt / Leopard slug (Limax maximus) mating pair following each other shortly before mating. These slugs are hermaphrodites and can be seen here transferring sperm to one another through their male organs, Sw...

Ingo Arndt / Leopard slug (Limax maximus) mating, hanging from a rope of mucus. These slugs are hermaphrodites and can be seen here transferring sperm to one another through their male organs, Switzerland

Ingo Arndt / Leopard slug (Limax maximus) climbing and eating at the same time a rope of mucus after mating. These slugs are hermaphrodites and can be seen here transferring sperm to one another through their male...