The common lizard, Britain's only viviparous reptile, faces habitat loss from scrub encroachment on heathland and improved grassland management, reducing populations across southern England.
Lizards in shaded or structurally homogeneous habitats cannot achieve the body temperatures required for effective digestion, reproduction and immune function. Thermal deprivation reduces reproductive success and increases parasite burden. Road casualties from rural roads crossing heathland habitats contribute to mortality in fragmented populations.