Photuris mysticalampas
Mysterious lantern firefly in an Atlantic white cedar forest in Delaware. (Photo: Radim Schreiber, fireflyexperience.org.)
U.S. State
Delaware
Life History
Activity Period and Flash Signal
Adults are active mid-June to late July and give off single flashes of medium luminosity typically every 3 to 7 seconds.
Distribution
This species is known from a single county in Delaware, but suspected to occur in similar habitat in Maryland.
Habitat Associations
The mysterious lantern firefly is a habitat specialist associated with high-quality forested peatland floodplains, in areas where Atlantic white cedar is often codominant.
Conservation Status
- IUCN Red List status: Endangered
- NatureServe status: G1 – Critically Imperiled, SNR (Delaware)
- U.S. Endangered Species Act status: Not listed
Threats
The primary threats to this species are habitat loss and degradation due to sea level rise.
Conservation Needs
- We need to know more about the distribution of this species. Report your firefly sightings on the Delmarva Peninsula to iNaturalist, or consider participating in Firefly Watch!
- Turn off your outdoor lights at night so the lights of this firefly aren’t diminished by light pollution. You can read more about firefly-friendly lighting in our fact sheet.
- Avoid pesticide use, which could harm this firefly, its habitat, or its prey.
- Protection of forested buffers along floodplain corridors where this species is found is recommended.
- More research on population size and trend, habitats and ecology, and threats is needed for this species.
Prepared By
Candace Fallon, The Xerces Society for Invertebrate Conservation, based on the IUCN Red List assessment
USA
