Firefly
Soft-winged beetles famous for their bioluminescent light signals at dusk. Adults rarely feed; larvae are active predators of slugs, snails, and earthworms in the soil.
Why you want them
Firefly larvae are specialised predators of slugs and snails - they inject a paralysing compound into prey and consume them over several days. Their population decline across many regions correlates directly with the reduction of dark, undisturbed grassland and the introduction of artificial light. Supporting fireflies means turning off unnecessary outdoor lights, avoiding pesticides, and maintaining areas of rough, undisturbed grass and leaf litter where larvae hunt and overwinter.
Helps control
How to attract them
- Long grass areas
- Log and leaf piles
- Reducing light pollution (turn off outdoor lights at night)
- No pesticide use
Preferred habitat
Long grass, hedgerow margins, and areas of rough ground. Larvae live in the soil and leaf litter. Adults emerge at dusk in early summer and flash their signals in open areas near vegetation.
What harms them
Light pollution (artificial light at night disrupts mating signals), pesticide use, loss of rough grassland, and excessive tidying that removes larval habitat.
Related pest guides
Garden, by Willowbottom works with nature, not against it. Support your garden allies and they will do most of the hard work for you.