Britain's 18 bat species face threats from roost disturbance, habitat loss, and lighting pollution, with all species fully protected under UK and EU wildlife law.
Individual bats experience significant welfare costs from roost disturbance, which can cause immediate mortality of young animals and thermal stress to adults during hibernation. Building renovation without bat surveys is a leading cause of roost destruction. More broadly, the decline in invertebrate abundance from intensive agriculture and light pollution reduces foraging success, potentially causing chronic nutritional stress. Conservation-focused development processes that incorporate bat surveys and roost protection, combined with invertebrate-rich garden and farmland habitats, provide direct welfare benefits to individual bats.