Wild Slow Worm Welfare: Legless Lizard in the Garden

The slow worm is Britain's only legless lizard, a common but declining garden reptile whose welfare depends on the availability of warm microhabitats and freedom from predation by domestic cats.

Key Facts

Slow worms are lizards, not snakes; they have eyelids and can shed their tails to escape predators
The species can live for over 30 years - among the longest-lived of all British reptiles
Slow worms feed on slugs, earthworms, and small invertebrates, making them beneficial garden inhabitants
They are ectothermic and rely on warm microhabitats including compost heaps, south-facing banks, and corrugated iron sheets
Domestic cats are significant predators; cat attacks cause severe injuries that frequently prove fatal
The species is protected under Schedule 5 of the Wildlife and Countryside Act 1981 against intentional killing
Population declines have been recorded across lowland Britain associated with habitat loss and intensification
Garden management that retains refugia - log piles, compost heaps, and rough vegetation - supports slow worm welfare

Welfare Considerations

Slow worm welfare is threatened primarily by domestic cat predation and loss of warm refugia in managed gardens. Individual slow worms injured by cats typically die from infection even when apparently healed; the mortality rate from cat attacks is very high. The provision of reptile refugia - sheets of corrugated iron, log piles, and undisturbed compost heaps - creates warm basking and sheltering sites that slow worms require. Keeping cats indoors or in enclosed gardens during peak reptile activity periods reduces predation pressure on this and other protected species.

What You Can Do

Create reptile refugia in your garden: corrugated iron sheets, log piles, and undisturbed rough vegetation
Keep cats indoors or in enclosed areas during periods of reptile activity (spring through autumn)
Report slow worm sightings to local wildlife record centres to assist with distribution monitoring
Avoid disturbing overwintering slow worms in compost heaps - check before turning in autumn
Advocate for cat containment policies in wildlife-sensitive areas to reduce reptile predation