Join a Naturalist at Detweiler Park for a chance to observe and catch fireflies in their natural habitat at night! A short hike and all the supplies you need will be provided. Dress for the weather and bring a flashlight. If the weather prevents the program from happening on Friday, June 28 the alternative date is Saturday, June 29. Program is for all ages and limited to 30 participants. This program is part of the Dauphin County Park Rx series of programs sponsored by Highmark Blue Shield. Pre-registration required.