Bats face multiple threats including white-nose syndrome, wind turbine collisions, roost disturbance, and pesticide-driven insect declines, with serious welfare implications for colonies and populations.
Bat welfare deserves far greater attention than it currently receives. White-nose syndrome causes a particularly disturbing form of suffering — bats wake repeatedly from hibernation due to fungal irritation on their wings and muzzles, depleting fat stores needed to survive winter. Affected bats emerge from hibernacula in winter conditions where they cannot feed, and die of starvation and exposure. Individual bats can be observed in visible distress outside hibernacula on cold winter days. Wind turbine strikes cause traumatic death. The social nature of bat colonies means that disease or roost disturbance affects many animals simultaneously, and the slow reproductive rate means populations take decades to recover from large mortality events.