Wild Slow Worm Conservation: Garden Reptile Welfare

Slow worms are legless lizards (not snakes) that are common in gardens with suitable habitat. Understanding their needs enables garden management that supports these often misunderstood reptiles.

Key Facts

Slow worms (Anguis fragilis) are legless lizards frequently mistaken for snakes; they differ in having eyelids and a different body plan
They are fully protected under the Wildlife and Countryside Act 1981: killing, injuring, or selling slow worms is illegal
Slow worms thermoregulate by basking under cover objects including corrugated metal, old carpet, and flat stones rather than in open sun
They are viviparous, giving birth to live young in late summer, with females retaining eggs internally rather than laying
Cats are a significant predator of slow worms in suburban gardens; dogs and strimmer injuries also cause significant mortality
Compost heaps provide both invertebrate prey and warm, moist microhabitats used for thermoregulation and potentially breeding

Welfare Considerations

Slow worm welfare in garden settings is primarily threatened by accidental harm from garden tools and deliberate killing by people who mistake them for snakes. Strimmer injuries are particularly common and cause severe lacerations that are usually fatal. Cat predation affects both adults and juveniles. Creating suitable slow worm habitat - corrugated metal sheets or roofing felt laid flat provide excellent basking refugia - encourages slow worms to areas away from active garden management. Compost heaps used by slow worms should be turned carefully, checking for animals before using power tools.

What You Can Do

Place a piece of corrugated metal roofing sheet in a sunny garden spot as a slow worm basking site
Check compost heaps carefully before turning with a fork - slow worms may be sheltering inside
Never kill a slow worm: they are legally protected and ecologically valuable
Report slow worm sightings to your local Wildlife Trust and national reptile recording schemes
Tell others that slow worms are lizards not snakes and are harmless and legally protected
Keep cats indoors or supervised during the slow worm active season from April to October