Bat roosts in buildings and trees are legally protected across much of Europe and North America, yet disturbance and destruction during development and renovation remains a significant welfare and conservation threat.
Bat roosts represent critical resources for species that cannot easily relocate if disturbed. Disturbance during maternity season is particularly harmful, separating mothers from young and causing high mortality. Legal protections reflect both conservation status and welfare importance of undisturbed roosting. Good building renovation practice incorporates proactive bat surveys and mitigation, benefiting both bats and developers.