Fireflies are actually beetles. Their larvae eat the larvae of snails and slugs, so they are great to have in your lawn and garden! Adult fireflies eat plant pollen and nectar.
Fireflies are believed to be decreasing in number throughout the world because of pesticides, decreased habitat, and light pollution.
Pesticides, weedkillers, and synthetic fertilizers kill fireflies, their larvae, and the larvae of snails and slugs that they eat.
If you don’t kill the fireflies they eat insect pests. And of course, they make summer nights really beautiful!