TRAVERSE CITY, MICH. • The Biden administration last week declared the northern long-eared bat endangered in a last-ditch effort to save a species driven to the brink of extinction by white-nose syndrome, a fungal disease.

“White-nose syndrome is decimating cave-dwelling bat species like the northern long-eared bat at unprecedented rates,” said Martha Williams, director of the U.S. Fish and Wildlife Service.

The agency is “deeply committed to working with partners on a balanced approach that reduces the impacts of disease and protects the survivors to recover northern longeared bat populations,” she said.

First documented in the U.S. in 2006, the disease has infected 12 types of bats and killed millions. The northern long-eared bat is among the hardest hit, with estimated declines of 97% or higher in affected populations. The bat is found in 37 eastern and north-central states, and much of Canada.

Named for white, fuzzy spots that appear on infected bats, white-nose syndrome attacks bats’ wings, muzzles and ears when they hibernate in caves and abandoned mines.

It causes them to wake early from hibernation and to sometimes fly outside. They can burn up their winter fat stores and eventually starve.

The disease has spread across nearly 80% of the geographical range where northern long-eared bats live.

Another species ravaged by the fungus is the tricolored bat, which the government proposed to classify as endangered in September. A third, the little brown bat, is being evaluated for a potential listing.

Bats are believed to give U.S. agriculture an annual boost of $3 billion by gobbling pests and pollinating some plants.

The Fish and Wildlife Service designated the northern long-eared bat as threatened in 2015. With its situation increasingly dire, the agency proposed an endangered listing in March and considered public comments before deciding to proceed. The reclassification takes effect Jan. 30. Under the Endangered Species Act, federal agencies are required to consult with the Fish and Wildlife Service to be sure projects that they fund or authorize — such as timber harvests, prescribed fires and highway construction — will not jeopardize a listed species’ existence.