Wild Animal Welfare: Slow Worm Conservation

Slow worms are legless lizards, not snakes, and one of Britain's most frequently persecuted reptiles. Understanding their ecology and welfare helps correct misconceptions.

Key Facts

Slow worms (Anguis fragilis) are legless lizards - they have eyelids and cannot unhinge their jaws like snakes
They are legally protected from intentional killing in Great Britain
Slow worms live for up to 30 years and give birth to live young in late summer
Garden habitats including compost heaps, log piles, and undisturbed lawn edges are important slow worm refugia
Many slow worms are killed by cats and garden strimmers - their slow movement makes them vulnerable
Slow worm population declines are linked to garden 'tidying' that removes refuge habitat

Welfare Considerations

Slow worm welfare suffers disproportionately from human misidentification and fear. Many people who encounter slow worms believe they are seeing snakes and kill them - an illegal act that causes the death of a long-lived, legally protected animal. Education about slow worm identification is a direct welfare intervention. Beyond persecution, slow worm welfare is affected by habitat loss in gardens: the removal of compost heaps, log piles, and rough grass edges eliminates the warm, sheltered microhabitats slow worms require for thermoregulation and overwintering. Creating and maintaining these habitats is one of the most straightforward garden wildlife welfare improvements, with benefits extending across a wide range of invertebrates, amphibians, and other reptiles.

What You Can Do

Learn to identify slow worms to prevent accidental killing and report illegal persecution
Create slow worm habitat: a south-facing compost heap or log pile is ideal
Check garden areas for slow worms before strimming - scan the area first
Keep cats indoors in areas with known slow worm populations during active summer months
Report slow worm sightings to your county reptile recorder to support population monitoring