Bat maternity roosts — where females give birth and raise young — are legally protected and critically important for bat population welfare and conservation.
Maternity roost disturbance during the summer breeding season causes direct welfare harm through maternal separation, pup abandonment, and temperature stress to developing young. A roost disturbed during construction work may result in mothers being unable to return to their pups, causing pup death from starvation and hypothermia. At the population level, loss of maternity roost sites removes the infrastructure that enables bat population recovery. Protecting existing maternity roosts is therefore simultaneously an individual welfare intervention and a population conservation measure.