Bat colonies face threats from white-nose syndrome, wind turbines, roost disturbance and habitat loss, with serious welfare implications for these ecologically vital mammals.
Bat colony welfare has several distinctive features. Maternity colonies - where females raise pups together - are extremely sensitive to disturbance. Pups born helpless require continuous maternal care; even brief disturbance causing female flight can cause pup death from falls or separation. White-nose syndrome causes bats to rouse repeatedly from winter torpor, burning fat reserves until they starve - a prolonged, energy-depleted death affecting millions. Wind turbine barotrauma causes internal hemorrhage in bats that approach turbines during migration. Roost exclusion during breeding season, however necessary for building work, should be timed to avoid trapping dependent young. Bat welfare requires understanding the colony structure that makes them particularly vulnerable to specific types of disturbance.