Epiaeschna heros
In 3 days ~20% in a week ~40%
Epiaeschna heros, the swamp darner, is a species of darner in the dragonfly family Aeshnidae. It is found in eastern North America. It is the only extant member of the genus Epiaeschna, a genus that is well-represented in fossil specimens found in Eurasia, suggesting a wider distribution during the mid-Cenozoic.
The IUCN conservation status of Epiaeschna heros is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017. The species has been witnessed feeding on Solenopsis invicta ants during nuptial flights. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Point Pelee National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Philadelphia | 🇺🇸 United States | |
| 3 | Houston | 🇺🇸 United States | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | Baltimore | 🇺🇸 United States | |
| 7 | Dallas | 🇺🇸 United States | |
| 8 | Boston | 🇺🇸 United States | |
| 9 | Toronto | 🇨🇦 Canada | |
| 10 | Austin | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Swamp Darner sighting in Point Pelee National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 142nd most-seen of the 196 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July to September
In those months about 10% of wildlife watchers report a Swamp Darner in Point Pelee National Park on a given day, against under 5% in October to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Swamp Darner sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Swamp Darner sightings, Point Pelee National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Congaree National Park (United States, about 10%).
Same family: Aeshnidae
The closest relatives of the Swamp Darner that you can see in Point Pelee National Park (family Aeshnidae, Darners) are Common Green Darner (about 20%) and Green-Striped Darner (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Swamp Darner is recorded against all the insects logged in Point Pelee 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.
