Please enter guest meal selections in the notes. They also tend to congregate in small, highly localized groups near springs and seeps, where they eat snails. Very few fireflies live west of Kansas. Do not litter. COVID origins? Fireflies do not migrate; they live in the hay fields year round. Its no surprise, then, that the discovery of a new bug species in California is significant news. According to Firefly.org, you can: Install water features in your garden. As the area became developed they seemed to disapear. But most Californians either are never going to see them or wont notice them when they do. Firefly larvae are carnivorous and eat snails and insects. Fireflies are not flies but are actually beetles, in the family Lampyridae.