Also known as Iberian Slug, Lusitanian Slug, Killer Slug
Spanish slugs are voracious, highly adaptable terrestrial mollusks notorious for their invasive spread across Europe. They produce copius amounts of thick, sticky slime that repels most predators while retaining moisture in dry conditions. As hermaphroditic breeders capable of self-fertilization, single individuals can deposit hundreds of eggs under leaf litter, rapidly establishing dominant populations.
ThreatsMolluscicides, extreme prolonged drought, and targeted biological pest control
HabitatsCultivated gardens, agricultural fields, woodland edges, and compost heaps
Life span1 year
Size / weightNot available
Classification
OrderStylommatophora
FamilyArionidae
GenusArion
SpeciesArion vulgaris
Range & activity
Range data is not available yet.
Safe observation
Interaction riskModerate
Low
Moderate
High
Very high
Why interaction risk is moderate
Can transmit lungworm parasites to pets if ingested; wash hands after handling and keep away from dogs.
Why it is dangerous
Acts as an intermediate host for Angiostrongylus parasites such as canine heartworm and rat lungworm, which can cause severe neurological damage or respiratory failure if eaten.
How to recognize a risky encounter
Look for a large, plump slug ranging from reddish-brown to dull orange without distinct stripes, featuring a granular mantle.
What to do
Do not allow pets to chew or consume slugs, and wash your hands thoroughly with soap if direct contact occurs.
Responsible observation
Garden management: Inspect leafy plants and damp areas beneath flowerpots at dusk to spot them.
Handling: Wear gloves to avoid sticky, difficult-to-wash defensive mucus.
Pet safety: Prevent dogs from investigating or licking areas heavily populated by slugs.
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