White-nose syndrome is named for the fuzzy white growth of fungus observed on the faces of infected bats. Infected bats show unusual behavior, such as flying during the day in summer or leaving caves during their usual winter hibernation, when no bugs are present for them to eat. A wildlife veterinarian at the University of Wisconsin confirmed the disease kills bats by causing their bodies to overheat, burning energy too quickly and at a time — in winter — when no insects are present to replace the lost calories and when it’s far too cold for the mammals to survive outside.
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