Common lizards are Britain's most widespread reptile and can thrive in gardens with suitable basking and hibernation sites. Understanding their needs guides simple conservation actions.
Common lizards are ectotherms whose welfare depends entirely on the thermal quality of available basking habitat. Gardens with hard landscaping, excessive tidiness or north-facing aspects provide insufficient warmth for lizards to thermoregulate adequately. Cats patrolling gardens prevent lizards from using any habitat within their territory, effectively excluding them from otherwise suitable areas. Lizards that cannot thermoregulate adequately cannot digest food, reproduce successfully or mount effective immune responses to parasites and disease. Simple habitat improvements that provide warm, sheltered basking areas and refuge from predators can transform a garden from unsuitable to ideal lizard habitat.