Wild Slow Worm Welfare in Gardens

Slow worms are legless lizards native to the UK that frequently inhabit garden compost heaps, under roofing felt, and in overgrown corners. Understanding their needs helps gardeners support this protected and beneficial reptile.

Key Facts

Slow worms are legless lizards (not snakes) - they have eyelids, visible ears, and can shed their tail if seized
They are fully protected under the Wildlife and Countryside Act 1981 - it is illegal to kill, injure, or disturb them intentionally
Slow worms feed on slugs, worms, and small invertebrates making them beneficial garden inhabitants
They are viviparous - females give birth to live young rather than laying eggs
Compost heaps, under corrugated iron or roofing felt, and dense vegetation are favoured refugia
Cat predation is a significant source of mortality, as slow worms cannot escape quickly
Garden tools including lawnmowers, strimmers, and forks cause direct injury and mortality
Slow worm populations have declined in many areas due to habitat loss and fragmentation

Welfare Considerations

Slow worm welfare in gardens depends primarily on protection from direct injury and providing refugia that allow thermoregulation. Garden tools including strimmers and rotavators cause direct injury to slow worms sheltering in vegetation and soil. Cat predation causes traumatic injury. Providing purpose-made reptile refugia (roofing felt or corrugated tin sheets on bare ground) and checking garden machinery use areas before working concentrates benefits for individual slow worms. Their status as a protected species means that intentional harm is illegal.

What You Can Do

Check long grass, compost heaps, and rough areas before using strimmers or rotavators
Keep cats indoors during periods when slow worms are most active (spring and summer mornings)
Install reptile refugia (squares of roofing felt or corrugated tin) in sunny garden corners
Report slow worm sightings to the Amphibian and Reptile Conservation Trust recording scheme