Pyractomena borealis
In 3 days ~20% in a week ~50%
Pyractomena borealis commonly known as the Spring tree-top flasher is a species of firefly in the beetle family Lampyridae. It is found in North America, where it has a very wide distribution, as it is known from Alberta east to the Maritime Provinces of Canada, and south to all US states east of the Mississippi River. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Philadelphia | 🇺🇸 United States | |
| 2 | Baltimore | 🇺🇸 United States | |
| 3 | Washington | 🇺🇸 United States | |
| 4 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Spring Treetop Flasher sighting in Congaree National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 117th most-seen of the 145 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
March
In that month about 30% of wildlife watchers report a Spring Treetop Flasher in Congaree National Park on a given day, against under 5% in May to February, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Spring Treetop Flasher sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Spring Treetop Flasher sightings, Congaree National Park has the highest daily chance: about 10%. Next come Great Smoky Mountains National Park (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Spring Treetop Flasher is recorded against all the insects logged in Congaree National Park (6 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.
