Bat White Nose Syndrome and North American Welfare Crisis

White nose syndrome has killed over 6 million North American bats since 2006, causing mass welfare harm through a fungal infection that disrupts hibernation with fatal consequences.

Key Facts

Pseudogymnoascus destructans (Pd) fungus has killed an estimated 6+ million North American bats
The fungus was introduced from Europe where bats appear to have evolved some resistance
WNS causes bats to arouse from hibernation prematurely, burning fat reserves needed to survive winter
Affected bats fly in daytime in winter, often landing on snow where they die from cold
Some species including little brown bats have declined by over 90% in affected areas
Probiotic treatments applied to cave walls show some promise in reducing Pd load

Welfare Considerations

White nose syndrome causes welfare harm through a specific mechanism: premature arousal from hibernation. Bats woken early from hibernation burn their fat reserves in flight activity and then starve, returning to hibernation but unable to maintain it. The cycle of arousal and re-hibernation repeats until fat reserves are exhausted and the bat dies - a process that may take weeks. This is serious, prolonged individual suffering at mass scale. The conservation collapse in some species represents the loss of millions of welfare-experiencing individuals over less than two decades. Biosecurity in caves - decontaminating equipment and clothing - prevents further spread.

What You Can Do

Decontaminate cave exploration equipment to prevent Pd spread between sites
Support the US Fish and Wildlife Service WNS response fund
Follow probiotic treatment research through Bat Conservation International
Avoid disturbing bat hibernation sites in winter - arousal is welfare-harmful
Advocate for strict cave biosecurity protocols in national cave management policies