Firefly Watch! Tuesday, 05/25 - Thursday, 08/05 9:15 p.m. Fireflies appear every summer, but are they starting to disappear? Find the answer by joining the Berkshire Museum and Massachusetts Department of Conservation and Recreation and become a Firefly Watch Citizen Scientist. The Firefly Watch meets every Thursday at 9:15 p.m. at the Mount Greylock Visitors Center. Bring a flashlight, a pencil and pad of paper, and a stopwatch. Be sure to dress appropriately for the evening conditions, as bugspray is not recommended. This activity is fun for all ages.