http://www.ask.com/question/where-do-fireflies-go-during-the-day from another source.... Daylight HangoutsFields and gardens give lightning bugs the long grass they love. During the day, when they're not so active, they'll hang out on the ground. Tall grass provides cover during the daylight hours, as well as a good vantage point for sending and receiving signals at night. As the sun sets, they'll make their way to the tips of grass blades, where they'll launch from to begin their night's work.