Photinus marginellus
In 3 days ~10% in a week ~30%
Photinus marginellus is a species of firefly in the beetle family Lampyridae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Little Gray Firefly sighting in Great Smoky Mountains National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Little Gray Firefly in Great Smoky Mountains National Park on a given day, against under 5% in August to May, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Little Gray Firefly sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Great Smoky Mountains National Park, in our data
Great Smoky Mountains National Park is the only park on Wallace's Line with enough records to rate Little Gray Firefly sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Photinus
The closest relatives of the Little Gray Firefly that you can see in Great Smoky Mountains National Park (genus Photinus, Rover Fireflies) are Winter Firefly (about 10%) and Common Eastern Firefly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Little Gray Firefly is recorded against all the insects logged in Great Smoky Mountains National Park (12 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
