Answer;
The population of "little brown bats" has been killed off.
Explanation;
-White-Nose Syndrome was first documented in 2006 in a tourist cave near Albany, New York. Dead and dying bats were then found in four nearby caves, 30 km west of Albany.
-The fungus appears to be the cause of a disease called white-nose syndrome, which has killed more than a million bats in the past four years. It even threatens some of the continent’s most abundant bat species with extinction.
