Species · GBIF taxon 1162763
Common Eastern Firefly
Photinus pyralisAlso known as Big Dipper Firefly, Lightning Bug, Eastern Firefly
These beetles are famous for their twilight courtship displays, where males fly in a characteristic J-shaped path while emitting a bright yellow-green glow. Females wait in the grass below, flashing back to guide the males down for mating. While adults live only a few weeks to reproduce, their predatory larvae spend up to two years underground hunting soft-bodied invertebrates.
NocturnalBioluminescentBeetle
—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Diet & prey
- Earthworms
- Snails
- Slugs
Predators
- Spiders
- Bats
- Photuris Fireflies
ThreatsLight pollution, habitat loss, and pesticide use.
HabitatsMeadows, lawns, forest edges, and suburban gardens.
Life span1 to 2 years
Size / weightNot available
Classification
- FamilyLampyridae
- SpeciesPhotinus pyralis
Range data is not available yet.
Interaction riskHigh
- Low
- Moderate
- High
- Very high
- Why interaction risk is high
- Contains lucibufagins which are highly toxic to pets; do not allow lizards, birds, or cats to eat them.
- Why it is dangerous
- Contains lucibufagins, self-defense steroid toxins that can cause rapid heart failure and death in reptiles, amphibians, and birds.
- How to recognize a risky encounter
- Identified by its yellow-bordered black pronotum with a red central spot and its distinctive J-shaped flight flash.
- What to do
- Never feed wild fireflies to pet reptiles or birds; wash hands after handling to remove bitter compounds.
Responsible observation
- Minimize artificial light: Turn off outdoor lights during summer evenings to help them find mates.
- Catch and release gently: Use a soft net or cup, keep them humid, and release them within an hour.
- Watch the flash pattern: Look for the characteristic J-shaped yellow light trail just above the grass.
Predator Gould363 / CC BY-SA 4.0 · cc-by-sa
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