White-nose syndrome has killed over 90% of some North American bat species since 2006. Understanding the disease, its welfare impacts, and conservation responses is essential for protecting these vital animals.
White-nose syndrome causes a particularly distressing form of death: bats roused prematurely from hibernation by the fungal disruption emerge in winter when no insects are available, burn remaining fat reserves flying futilely, and die from hypothermia and starvation. The mass mortality events — cave floors carpeted with dead bats during winter — represent an ecological catastrophe and a profound animal welfare tragedy. Individual bats experience the distress of inappropriate arousal, the confusion of finding no food, and the suffering of starvation and hypothermia. Conservation responses including probiotic treatments and hibernaculum management aim to both conserve populations and reduce the suffering of affected individuals.