Why Are Fireflies Endangered in PA?

There aren’t many experiences more quintessentially summery than fireflies emerging as twilight descends, blinking on and off over the grass of a park. However, populations of these fascinating little beetles are declining due to light pollution and habitat loss. But good news! The Pennsylvania Department of Conservation and Natural Resources has tips on how to help with firefly conservation.

💡 Turn Off Your Lights

Fireflies, also known as lightning bugs, are masters of bioluminescence (they control the amount of oxygen that interacts with a chemical in their abdomens to create light), and use their flashing to attract mates. External light from street lamps, buildings, and homes disrupt these biological patterns and drive them away from their preferred darker habitats.

🌌 Make a Firefly Habitat

If you have access to a yard or a garden, consider planting native species or saving some of your yard debris and leaf litter to create a corner of safety for fireflies. Some firefly larvae are even natural garden protection, eating slugs and snails that might be after your crop.

🔬 Be a Firefly Observer

Help out with firefly conservation by watching and enjoying them! You can be a part of the community science effort Firefly Watch that tracks and records firefly populations, the first step in identifying and addressing the threats to these special insects.

❓ Did you know?

Fireflies are near and dear to Pennsylvania’s heart — but do you know the local history of PA’s state bug?