MG-bats

WASHINGTON, DC - JUNE 5, 2014: District Department of the Environment wildlife biologist Lindsay Rohrbaugh monitors bat populations in Rock Creek Park on June 5, 2014. (Photo by Lance Rosenfield/Prime for The Washington Post)
WASHINGTON, DC - JUNE 5, 2014: District Department of the Environment wildlife biologist Lindsay Rohrbaugh monitors bat populations in Rock Creek Park on June 5, 2014. (Photo by Lance Rosenfield/Prime for The Washington Post)